6) In a purely electric vehicle, energy usually is stored in batteries. The stored energy is used to
power the vehicle until the energy is depleted, and then energy has to be stored once more by
recharging the batteries. An electric wheelchair has a mass of 26 kg and is custom–designed for a
person with a mass of 80. 0 kg. The stored energy available in its batteries is 2. 4106
J. The
wheelchair motor requires a power of 340. 0 W for driving under typical conditions. This is
sufficient to propel the person in the wheelchair along at a speed of 24 km/h.
a. Determine the work done by the motor when the wheelchair starts at rest and speeds up to
its normal speed.
b. Determine the maximum distance that the wheelchair can travel on a horizontal surface at its
normal speed, using its stored energy. (Ignore the energy needed for it to speed up when it
starts. )
c. Suppose that 0. 023 percent of the power required for driving is expended against drag due
to the flexing of the wheelchair’s soft rubber tires. Calculate the magnitude of the drag force
Answers
The magnitude of the Drag force is 0.0117 N
a) To determine the work done by the motor when the wheelchair starts at rest and speeds up to its normal speed, we can use the work-energy theorem:
Work = (1/2) * m * (vf^2 - vi^2)
Where m is the total mass of the wheelchair and person (26 kg + 80 kg = 106 kg), vf is the final speed (24 km/h = 6.67 m/s), and vi is the initial speed (0 m/s).
Work = (1/2) * 106 kg * (6.67 m/s)^2
Work ≈ 1,491.1 J
b) To determine the maximum distance the wheelchair can travel on a horizontal surface at its normal speed, we can use the following formula:
Distance = (Stored energy) / (Power * Time)
First, we need to calculate the time that the wheelchair can run at normal speed:
Time = (Stored energy) / (Power)
Time = 2.4 * 10^6 J / 340 W
Time ≈ 7,058.8 s
Now we can calculate the distance:
Distance = (6.67 m/s) * (7,058.8 s)
Distance ≈ 47,102.4 m
c) To calculate the magnitude of the drag force due to the flexing of the wheelchair's soft rubber tires, we can use the following formula:
Drag force = (Power expended against drag) / (speed)
First, we need to calculate the power expended against drag:
Power expended against drag = 0.00023 * 340 W
Power expended against drag ≈ 0.0782 W
Now we can calculate the drag force:
Drag force = 0.0782 W / 6.67 m/s
Drag force ≈ 0.0117 N
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Related Questions
In which part of the EM spectrum do you see the colors red, orange, yellow, green, blue, indigo, and violet (ROYGBIV);
gamma rays
ultraviolet rays
microwaves
visible light
Answers
Answer:
gamma rays
Explanation:
hope it helps
a car traveled 139.2km in 3.8 hours. what was the average speed?
Answers
Answer:
36.63 km/hrExplanation:
The average speed of the car can be found by using the formula
\(v = \frac{d}{t } \\ \)
d is the distance
t is the time taken
From the question we have
\(v = \frac{139.2}{3.8} \\ = 36.63157...\)
We have the final answer as
36.63 km/hrHope this helps you
Question 41 Marks: 1 All of the following will generally vary directly with the quantity of water used for domestic purposes exceptChoose one answer. a. availability of water b. habits of the people c. cost of water d. amount of minerals in the water
Answers
All of the following wills generally vary directly with the quantity of water used for domestic purposes amount of minerals in the water. Option D is the correct answer.
The quantity of water used for domestic purposes generally has a direct effect on the habits of the people, the cost of water, and the number of minerals in the water.
As more water is used, people tend to develop habits of using more water, leading to an increase in the overall cost of water usage.
Additionally, the more water used, the higher the concentration of minerals in the water, which can lead to scaling in pipes and appliances.
However, the availability of water may not necessarily vary directly with the quantity of water used, as it can depend on a variety of factors such as location, climate, and infrastructure.
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What is the magnetic force on a proton that is moving at 2.5 107
m/s up
through a magnetic field that is 0.12 T and pointing toward you? The charge
on a proton is 1.6 x 10-19 C. Use F
qvx B sin(e).
• A. 4.0 x 10-12 N down
•
B. 4.8 x 10-13 N left
• C. 4.0 x 10-12 N up
• D. 4.8 x 10-13 N right
Answers
The answer is D: 4.8x 10⁻¹³N right
The magnetic force is given as: F = qvBsinФ
where Ф is the angle between magnetic field (B) & the velocity of charge (v).
Since there is no Ф given, we assume, Ф = 90.
And we know, sin 90 = 1, we get,
⇒ F = qvB
⇒ F = 1.6×10^(-19) C ×2.5×10^(7)×0.12 T
⇒ F = 0.48 × 10^(-12)
or F = 4.8 × 10^(-13)
Now, using Fleming's Left Hand Rule to find the direction (right).
Thus the answer is D= 4.8x10⁻¹³N right
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The Joule is the unit used for kinetic
energy. It is based on meters,
klograms, and
O grams
O liters
O seconds
Answers
How does an inclined plane increase force?
Answers
Acceleration will increase as the angle of incline does, and as a result, force will as well.
The gravitational force acting on the cart increases as the slope of the incline increases, causing it to accelerate more quickly.The ramp's steepness will cause an increase in inclination. As a result, the acceleration increases as the inclination angle increases. This acceleration causes the object to descend with greater speed.
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A student is investigating inertia and acceleration. The data the student collects is shown in the table.
Force (N) Mass (kg) Acceleration (m/s²)
10
10
20
20
1
2
1
2
b
Oc
Od
Assuming the force acting on the objects is constant, which claim about inertia and acceleration is supported by the data?
0.1
0.2
Next Page
0.05
0.1
An object with a lower mass has less inertia which causes it to speed up less quickly.
An object with a higher mass has more inertia which causes it to speed up less quickly.
An object with a higher mass has less inertia which causes it to speed up more quickly.
An object with a lower mass has more inertia which causes it to speed up more quickly.
Back
Answers
Assuming the force acting on the objects is constant, a claim about inertia and acceleration which is supported by the data include the following: B. An object with a higher mass has more inertia which causes it to speed up less quickly.
What is Newton's First Law (Inertia)?Newton's First Law of Motion is also referred to as Law of Inertia and it states that an object in motion would continue in its state of motion at continuous velocity (same speed and direction) or if at rest, it will remain at rest unless it is acted upon by an external force.
This ultimately implies that, the amount of net force keeping a physical object moving at a constant speed and in a specific direction is always equal to zero (0) newton in accordance with Newton's First Law of Motion.
In this context, we can reasonably infer and logically deduce that a physical object that has a higher mass would have more inertia, which causes it to either experience a slower motion or speed up less quickly.
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Answer: its c
Explanation: i took the test
a power loss ride through function is limited to _____ seconds.
Answers
A power loss ride through function is limited to 1-2 seconds.
Power loss functionTypically, the length of the power loss ride-through function is created to offer a long enough buffer time to bridge the gap between the power loss and the power restoration. It enables the system or gadget to securely shut down without causing a sudden disruption to operations.
The application requirements, system criticality, energy storage or backup power capacity, and the time needed for power restoration or alternative power source activation can all be used to establish the precise duration of the ride-through function.
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What type of circuit is seen in this picture?
-Open
-Parallel
-Series
-AC
Answers
Answer:
You need the attachment, sorry I can't answer :(
Answer:
It is short thats what the awnser is
A salt solution wil
conduct electricity, but a sugar solution will
not. Explain why.
Answers
1. Do you think your memories can be altered? Explain
Answers
Answer:
Yes
Explanation:
I think our memories can be altered by emotions. If someone tells you something over and over and over again with strong emotion you will start to remember that more than the memory.
Emotions are very powerful and if you feel a certain emotion connected with a different memory I think that is stronger and can trick your brain into thinking that is the memory because of the strong emotion, even though the true memory was right, since it might not have as strong of mental emotion your brain will think that is the false memory because whatever is more memorable your brain will remember.
If that makes any sense,
Yellow lines in the absorption spectrum of mercury vapor correspond to photons with an energy of about 2 eV. What can you conclude about the electron energy levels in mercury atoms?
A.
There must be energy levels with a difference of about 4 eV.
B.
There must be energy levels with a difference of about 2 eV.
C.
There must be energy levels with a difference of about 1 eV.
D.
There must be energy levels with no difference in energies.
Answers
Yellow lines in the absorption spectrum of mercury vapor correspond to photons with an energy of about 2 eV, it is concluded that the electron energy levels in mercury atoms are such that there must be energy levels with a difference of about 2 eV, which is in option B.
What is the absorption spectrum?Yellow lines in the absorption spectrum of mercury vapor correspond to photons with an energy of about 2 eV, which indicates that the electrons in the mercury atoms are absorbing photons with an energy equal to the energy difference between two energy levels in the atoms.
Hence, it is concluded that the electron energy levels in mercury atoms are such that there must be energy levels with a difference of about 2 eV, which is in option B.
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A zebra is running away from a lion and covers a distance of 56 min 7 seconds, what is the speed of the
zebra?
Answers
Answer:
i dont know this is hard for me
3.
The mass of a regulation tennis ball is 57 g. Typically during a serve the ball is in contact with the tennis racket for 30 ms. If the serve
was measured at 73.14 m/s what impulse was exerted on the tennis ball?
5.5 kg. m/s
7.8 kgm/s
2.3 kg. m/s
4.2 kg. m/s
Answers
B:because
What is resistive force?
A bullet of mass 20 gm is shot from a gun with velocity 200ms^-1. The bullet stops after penetrating 6cm of a wood.
Determine resistive force of the bullet.
Answers
Answer:
In physics, resistive force is a force, or the vector sum of numerous forces, whose direction is opposite to the motion of a body, and may refer to: Friction, during sliding and/or rolling.
A 7.80-g bullet moving at 575 m/s penetrates a tree trunk to a depth of 5.50 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. (b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.
Explanation:
slove these question
Answers
Answer:
the answer would be left side a to right side b left side b to left side c left side c to left side d left side d to right side e
Explanation:
A ring of charge, with charge Q and radius R, is centered at the origin (x=0) and perpendicular to the x-axis. A point charge with charge q and mass m can slide along the x-axis. The point charges starts at the position x
i
=2R (it is twice the radius of the ring from the origin) and is given an initial velocity
v
i
to the right, away from the ring What is the speed of the charge when it passes through the ring, at x
f
=0. Q=42.5μC,q=−8.75μC,R=0.17 m, m=4.35×10
−4
kg,v
i
=37.5 m/s
Answers
Solve for v_f using a calculator or algebraic manipulation to find the speed of the charge when it passes through the ring at x_f = 0.
To find the speed of the charge when it passes through the ring, we can use the principle of conservation of mechanical energy.
The initial mechanical energy of the system consists of the kinetic energy of the moving charge and the electric potential energy due to the interaction between the point charge and the ring of charge. The final mechanical energy of the system is the kinetic energy of the charge when it passes through the ring.
The equation for conservation of mechanical energy can be written as:
(1/2) * m * v_i^2 + k * (q * Q) / (x_i - R) = (1/2) * m * v_f^2
where:
m is the mass of the point charge
v_i is the initial velocity of the point charge
k is the Coulomb's constant (k = 8.99 * 10^9 Nm^2/C^2)
q is the charge of the point charge
Q is the charge of the ring of charge
x_i is the initial position of the point charge
R is the radius of the ring of charge
v_f is the final velocity of the point charge when it passes through the ring
x_f is the final position of the point charge (x_f = 0)
Given values:
q = -8.75 μC (convert to coulombs: -8.75 * 10^-6 C)
Q = 42.5 μC (convert to coulombs: 42.5 * 10^-6 C)
R = 0.17 m
m = 4.35 * 10^-4 kg
v_i = 37.5 m/s
x_i = 2R = 2 * 0.17 m
= 0.34 m
x_f = 0
Substituting the values into the conservation of mechanical energy equation, we can solve for v_f:
\((1/2) * (4.35 * 10^-4 kg) * (37.5 m/s)^2 + (8.99 * 10^9 Nm^2/C^2) * (-8.75 * 10^-6 C * 42.5 * 10^-6 C) / (0.17 m) = (1/2) * (4.35 * 10^-4 kg) * v_f^2\)
Solve for v_f using a calculator or algebraic manipulation to find the speed of the charge when it passes through the ring at x_f = 0.
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A man is holding a 5kg weight ball. What is the weight of the ball?
Simple net force problems ( always draw FBd/free body diagram and utilize guess)
(Guess-given,unknown,equations,set-up, and solve)
Answers
Answer:
1000kg
Explanation:
I'm smart I am a genius I know everything so I know it is 1000kg
A child and sled with a combined mass of 26.3 kg slide down a frictionless hill. The sled starts from rest and acquires a speed of 5.34 m/s by the time it reaches the bottom of the hill. What is the height (in m) of the hill?
Answers
Answer:
12 m/s
Explanation:
Toy cars 1, 2, and 3 are launched horizontally with the trajectories shown below. Cars 1 and 2
are launched from a 15 m high cliff, while Car 3 is launched from a 30 m high cliff. We can
ignore air friction.
Answers
Initial launch speed of the cars are in order as Vcar 1 = Vcar 2< Vcar 3
Speed (often abbreviated as "s") is a scalar variable that describes how much an object's location changes over time or how much it changes per unit of time. The average speed of an item in a period of time is the distance traveled by the object divided by the duration of the period.
Time divided by distance are the speed-related metrics.. The meter per second (m/s) is the SI unit of speed, while the kilometer per hour (kph) is the most often used unit of speed in daily life.
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what are two things that are infinite?
Answers
Answer:
Infinity = Never ending
Explanation:
The universe could be infinite, both in terms of space and time, but there is currently no way to test whether it goes on forever or is just very big. The part of the universe we are able to observe is finite, measuring about 46 billion light years in diameter.
The set of natural numbers is an infinite set. This kind of infinity is, by definition, called countable infinity. All sets that can be put into a bijective relation to the natural numbers are said to have this kind of infinity. This is also expressed by saying that the cardinal number of the set is aleph-naught (ℵ0).
Hope this helps. Mark as brainliest!
STARS ARE INFINITE , NUMBERS ARE INFINITE
Explanation:
Project paper:
It consists of a written report that the groups will prepare. Each
group of students has to produce a collective analysis of a
selected company (Mercedes Benz).
1. Strategy Diamond
2. V
Answers
The VRIO analysis will provide valuable insights into the internal factors that contribute to Mercedes Benz's competitive position in the automotive industry.
VRIO Analysis
In addition to the Strategy Diamond, the group will also conduct a VRIO analysis as part of their collective analysis of Mercedes Benz.
VRIO stands for Value, Rarity, Imitability, and Organization, and it is a framework used to evaluate the resources and capabilities of a company.
The VRIO analysis helps assess the competitive advantage of a company by examining whether its resources and capabilities are valuable, rare, difficult to imitate, and well-organized.
This analysis allows the group to identify the company's key strengths and weaknesses and understand how they contribute to its overall strategy.
By applying the VRIO framework to Mercedes Benz, the group can determine which aspects of the company's operations and resources provide a sustainable competitive advantage.
They will evaluate the value of Mercedes Benz's brand reputation, technological innovation, manufacturing capabilities, and distribution network.
They will also assess the rarity of these resources and capabilities and analyze whether competitors can easily imitate or replicate them. Lastly, the group will examine how well Mercedes Benz's organization and management effectively leverage these resources to create value for the company.
The VRIO analysis will provide valuable insights into the internal factors that contribute to Mercedes Benz's competitive position in the automotive industry.
It will help the group understand the unique aspects of the company's operations and guide their analysis of the broader strategic context outlined in the Strategy Diamond.
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Define derived unit with example
Answers
Answer:
A derived unit is a SI unit of measurement comprised of a combination of the seven base units. Like SI unit of force is the derived unit, newton or N where N=s21×m×kg. There are some commonly used derived units which includes: 1. Pressure = AreaForce=m2N.
Explanation:
you have a 6-inch reflecting telescope and the following eyepieces: a 10-mm, a 20-mm, and a 40-mm. which eyepiece gives you the least magnification?
Answers
Answer:
Typically, eyepieces with a focal length of 10mm are used for close-up observations, while eyepieces with a 20mm focal length are better suited for viewing distant objects. One of the essential eyepiece characteristics is the eyepiece focal length.
For some of the smaller telescopes, the eyepiece size to reach max useful magnification would be 10mm-20mm. Since there are no eyepieces of that size, the minimum we are using is 40mm.
The eyepiece is an essential part of the telescope as it magnifies objects and images so users can see them better. The eyepiece of 10mm focal length is suitable for close-up observations, whereas one with a focal length of 20mm is ideally suited to viewing objects far away.
This makes them among the best beginner telescopes The first choice to make is between a reflector and a refractor. A 6-inch reflector telescope uses mirrors to focus incoming light onto a secondary mirror, which then directs it toward the eyepiece (located either at the rear or on the side of the telescope itself).
Explanation:
A mover does 422 J of work pushing a crate 8.39 m. How much force did he exert?
Answers
Answer:
50.3N
Explanation:
Work done = force x distance
422J. = force x 8.39m
÷8.39 both side to get force
Force is 50.3N to 1 d.p.
Check:
50.3 x 8.39=422.017J
Same as 422J to 1 d.p
Answer:
heartbroken
Explanation:
just failed my test cause i typed my answers in Caps. Acellus a scam . leave a heart if you feel for me :( (Answers above were right btw)
the nuclear force: (a) has infinite range. (b) is generally stronger than the electromagnetic force. (c) becomes infinite as the distance between particles approaches zero. (d) acts on electrons that may be inside the nucleus.
Answers
(b) Nuclear force is generally stronger than the electromagnetic force.
what is nuclear force?
A force known as the nuclear force interacts with the protons and neutrons of atoms. The force that holds protons and neutrons in a nucleus together is known as the nuclear force. Protons and protons, neutrons and neutrons, or neutrons and neutrons can all be affected by this force. The nucleus is held together by this force.
Nuclear force is generally stronger than the electromagnetic force.
The electromagnetic force, the second-strongest of the four forces, is around 137 times weaker than the force in the atomic nucleus.
Two of the four basic forces in physics are the electromagnetic force and the strong nuclear force. These forces interact within the atomic nucleus of an atom to determine the protons and neutrons that make up the nucleus.
So option (b) is correct option.
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Problem B: Shock Wave Escape (5 points)
The star of a distant solar system explodes as a supernova. At the moment of the explosion, an
resting exploration spaceship is 15 AU away from the shock wave. The shock wave of the explo-
sion travels with 25000 km/s towards the spaceship. To save the crew, the spacecraft makes use
of a special booster that uniformly accelerates at 150 m/s in the opposite direction.
Determine if the crew manages to escape from the shock wave. (Neglect relativistic effects. )
Answers
Based on the given values and calculations, the crew of the exploration spaceship will manage to escape from the shock wave of the supernova explosion.
We must calculate how long it will take for the shock wave of the supernova explosion to reach the exploratory spaceship and how far the spaceship will have traveled by that time in order to decide if the crew is able to escape.
First, we must convert the AU to km measurement of the distance between the spacecraft and the shock wave. 15 AU is equivalent to 2244 million km, with 1 AU being equal to 149.6 million km.
Using the equation d = vt, where d is distance, v is velocity, and t is time, we can calculate how long it will take for the shock wave to reach the spaceship. The velocity of the shock wave is given as 25000 km/s, so we have:
2244 million km = 25000 km/s x t
Solving for t, we get t = 89,760 seconds.
The distance the spacecraft will have covered during that period must now be calculated. The formula d = vt + 1/2 at2, where an is acceleration, can be used. Although the booster's stated acceleration is 150 m/s, we must convert this to km/s in order to use it in our computation. 0.15 km/s is equivalent to 150 m/s.
d = vt + 1/2 at^2
d = 0 km/s x 89,760 s + 1/2 (0.15 km/s^2) x (89,760 s)^2
d = 6005.76 million km
Therefore, the spaceship will have traveled 6005.76 million km by the time the shock wave reaches it.
The crew of the spaceship will definitely be able to escape the shock wave because it needs to travel a distance of 2244 million kilometers, while the spaceship will have traveled 6005, 76 million km in the opposite direction.
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g a metal ring with a clockwise current produces a magnetic field (right-hand-rule). if the current increases (which increases the field) over time, what direction will the induced current on the ring be?
Answers
The induced current on the ring will be counter-clockwise (left-hand-rule).
Fleming's left-hand rule for electric motors is one among a pair of visual mnemonics, the opposite being Fleming's proper-hand rule (for generators). They had been originated with the aid of John Ambrose Fleming, within the overdue nineteenth century, as a simple way of working out the direction of motion in an electric powered motor, or the route of electric modern in an electric generator.
While modern-day flows through a conducting twine, and an outside magnetic discipline is carried out across that float, the accomplishing twine experiences a pressure perpendicular each to that area and to the path of the current drift (i.e they're jointly perpendicular). A left hand can be held, as proven in the illustration, so one can represent 3 jointly orthogonal axes at the thumb, fore finger and center finger. each finger is then assigned to a quantity (mechanical force, magnetic field and electric powered present day). The right and left hand are used for turbines and automobiles respectively.
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A 1100 N crate slides 12 m down a ramp that
makes an angle of 31° with the horizontal. If the crate slides at a constant speed, how much thermal energy is created?
Answers
Answer: When a crate slides down a ramp at a constant speed, it means that the net force acting on the crate is zero. In this case, the force of gravity acting downward is balanced by the force of friction acting upward along the ramp. The work done by friction in this scenario converts mechanical energy into thermal energy, resulting in an increase in thermal energy.
To calculate the amount of thermal energy created, we need to determine the work done by friction. The work done by friction can be calculated using the formula:
Work = Force × Distance × Cosine of the angle between the force and the displacement
In this case, the force of friction is equal to the force of gravity component parallel to the ramp, which can be calculated as:
Force of gravity parallel to the ramp = Weight of the crate × Sin(θ)
where θ is the angle of the ramp (31°) and the weight of the crate is equal to its mass multiplied by the acceleration due to gravity.
Weight of the crate = mass × acceleration due to gravity
Once we calculate the force of friction, we can then determine the work done by friction using the given distance (12 m).
The thermal energy created is equal to the work done by friction. Remember that work and energy are measured in the same units (joules).
Let's calculate the thermal energy created step-by-step:
Calculate the weight of the crate:
Weight of the crate = mass × acceleration due to gravity
Calculate the force of gravity parallel to the ramp:
Force of gravity parallel to the ramp = Weight of the crate × Sin(θ)
Calculate the work done by friction:
Work = Force of friction × Distance × Cos(θ)
The thermal energy created is equal to the work done by friction.
Please provide the mass of the crate, and I can help you calculate the thermal energy created.
The rate of change of momentum?
Answers
Answer:
Answer in below and plz mark me as brainlist plz
Explanation:
The rate of change of momentum =tm(v−u) Rate of change of momentum = force applied. Force∝tm(v−u) Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Impulse is a change in momentum
The rate of change of momentum =tm(v−u) Rate of change of momentum = force applied. Force∝tm(v−u) Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Impulse is a change in momentum