how much work is done when a force of 45n pulls a wagon of 25 meters

The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about 1.22 m .

Option B is correct .

The player will be free falling because the basketball takes the same amount of time to ascend and descend. for 0.5 seconds. Time equals 0.5 seconds when he reaches his maximum height.

Distance is given by from the laws of motion equation :

                        s = ut + 1/2 at²

                        s = 0 × t + 1/2 × 9.81 × [ 0.5 ]²

                        s = 0 + 1/2 × 9.81 × 0.25

                         s = 1.22 m

According to the first law, a force acting on an object will not cause it to change its motion. According to the second law, an object's force is proportional to its acceleration divided by its mass.

According to the third law, when two objects interact, they exert forces of equal magnitude in opposite directions. The three conditions of movement are as per the following: v = u + at is the first equation of motion. s = ut + 1/2 at² is the solution to the second motion equation. The formula for the third motion equation is v² = u² + 2as.

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Since the relationship between wavelength and frequency is inverse, the wavelength of the sound coming from source A is half that of the sound coming from source B. This implies that wavelength is cut in half as frequency is doubled.

The distance between adjacent, identical wave components, such as between adjacent compressions as shown in Figure 17.8, is the wavelength of a sound. The frequency is the number of waves passing a point in a unit of time, and it is the same as the frequency of the source.

When anything vibrates, a sound is made. The medium (such as water, air, etc.) around the vibrating body also vibrates. Air vibrations are referred to as longitudinal waves.

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Two thin uniformly charged rods, each with length LL and total charge +Q+Q, are parallel and separated by a distance aa. The first rod has one end at the origin and its other end on the positive yy-axis. The second rod has its lower end on the positive xx-axis. The relative speed of the two charged rods is approximately 0.425 m/s.

The relative speed of the two charged rods can be determined using the principle of conservation of energy. When released from their initial configuration, the potential energy between the rods is converted into kinetic energy as they move apart. By equating the initial potential energy to the final kinetic energy, we can find the relative speed.

Given:

Length of each rod (L) = 50.0 cm

Distance between the rods (a) = 10.0 cm

Total charge on each rod (Q) = 10.0 μC

Mass of each rod (m) = 500 g

Step 1: Calculate the initial potential energy

The potential energy (U) between the two charged rods is given by the equation:

\(U = k * (Q^2) / a\)

where k is the Coulomb's constant \((k = 8.99 * 10^9 N m^2/C^2).\)

Plugging in the values, we have:

U = (8.99 x 10^9 N m^2/C^2) * [(10.0 x 10^-6 C)^2] / (0.1 m)

Step 2: Calculate the final kinetic energy

The final kinetic energy (K) is given by the equation:

K = (1/2) * (m * v^2)

where v is the relative speed of the rods.

Step 3: Equate the initial potential energy to the final kinetic energy

Setting U equal to K, we have:

(8.99 x 10^9 N m^2/C^2) * [(10.0 x 10^-6 C)^2] / (0.1 m) = (1/2) * (2 * m * v^2)

Simplifying the equation, we can solve for v:

v = sqrt[(2 * U) / m]

Substituting the values for U and m, we can calculate the relative speed.

The relative speed of the two charged rods is approximately 0.425 m/s.

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Answer: Mycobacterium tuberculosis

Explanation: The bacteria usually attack the lungs, but TB bacteria can attack any part of the body such as the kidney, spine, and brain. Not everyone infected with TB bacteria becomes sick.

The speed of the ballplayer immediately after stopping the ball is 3.92 kg·m/s divided by his mass. Unfortunately, the mass of the ballplayer is not provided, so we cannot calculate the exact speed. However, we can conclude that the ballplayer's speed will be less than 28 m/s due to the conservation of momentum.

To determine the speed of the ballplayer immediately after stopping the ball, we can use the principle of conservation of momentum. Since no external forces act on the system, the total momentum before and after the catch must be the same.

The momentum of an object can be calculated by multiplying its mass and velocity. Given that the ball has a mass of 140 g (or 0.14 kg) and is moving horizontally at 28 m/s, its momentum can be calculated as 0.14 kg * 28 m/s = 3.92 kg·m/s.

When the ballplayer catches the ball, the momentum of the system is conserved. Since the ballplayer initially has zero momentum (as he is stationary), the momentum after the catch is equal to the momentum of the ball. In summary, the speed of the ballplayer immediately after stopping the ball can be determined using the principle of conservation of momentum, but without the mass of the ballplayer, we cannot calculate the exact value.

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The pace at which an object's location shifts when seen from a particular angle and measured against a particular interval of time is referred to as its velocity.

When gravity first exerts force on an object, its initial velocity defines how quickly the object moves. The final velocity, on the other hand, is a vector number that gauges a moving body's speed and direction after it has reached its maximum acceleration.

No, it won't hit the intended objective.

The concept of velocity refers to the rate and direction of motion of a point. For instance, the orientation of a circular path is always perpendicular to the line that connects a point to the center of the circle.

No, the cannonball won't reach the target.

the settings provided;

cliff height, h = 100 m cannon's target distance, R = 400 m starting horizontal velocity, or = 50 m/s

The amount of time it takes for the cannonball to fall from the specified height is provided by:

h = voyt + gt2

1000+0.5 x 9.8 x 12 100= 4.9/2

12- 100 = 4.9

t=20.41

t = 4.52

The cannon ball's horizontal distance at this point is computed as follows:

X = vor xt

X= 50 x 4.52

X = 226 m

Less than the 400 m goal distance is 226 m.

As a result, we may infer that the cannon ball will miss its target.

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The net force on 2 square inches of the tire is 32 pounds.

The net force on 2 square inches of the tire is determined by the difference between the pressure inside the tire and the pressure outside the tire, multiplied by the area of the tire. We can use the formula:

net force = pressure difference x area

First, we need to calculate the pressure inside the tire. Since the tire pressure gauge reads 30 psi, we can assume that this is the pressure inside the tire.

The pressure outside the tire is given as 14 psi.

The pressure difference is therefore:

30 psi - 14 psi = 16 psi

We can now plug this into the formula:

net force = pressure difference x area

net force = 16 psi x 2 square inches

net force = 32 pounds

Therefore, the net force on 2 square inches of the tire is 32 pounds.

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Answer:

3,033,276 J

Explanation:

The work can be calculated as

W = Fd

Where F is the force and d is the distance.

Replacing F by 29,738 N and d by 102 m, we get:

W = (29,738 N)(102 m)

W = 3,033,276 J

Then, it has done 3,033,276 J

Explanation:

It is given that, the force of gravity pulls down on your school with a total force of 400,000 N.

The force of gravity is given by the formula as follows :

F = mg

m is mass and g is the acceleration due to gravity

Mass of an object remains same always. But if the mass of your school becomes twice of the initial mass, the force of gravity pulling down on your school would be exactly twice.

Answer:

Newton's Second laws of motion

Explanation:

This law states that the force acting on an object is directly proportional to its mass and the acceleration produced.

Newton's laws of motion provided a unified framework to understand and describe the motion of objects. They introduced the concept of force and explained how forces affect the motion of objects. Newton's laws revolutionized the field of physics by providing a solid foundation for studying and predicting the behavior of objects in motion.

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Answer:

Possiable answer by edge:

The shape of a river’s stream bed affects the speed and eroding power of a river by influencing the amount of friction between the water flowing through the river and the stream bed below. Friction is the force that opposes the motion of one surface as it moves across another surface. In a river, there is friction between the flowing water and the stream bed beneath it. Where a river is deep, less water comes into contact with the stream bed, so there is less friction. The reduced friction means there is less opposition to the water’s motion, so the river flows at a greater speed and has more kinetic energy for erosion. On the other hand, where a river is shallow, more water comes into contact with the stream bed, so there is more friction. The increased friction means there is more opposition to the water’s motion, so the river flows at a lesser speed and has less kinetic energy for erosion. Also, the roughness of a stream bed covered with boulders and other obstacles causes the water to flow through the river in a turbulent fashion. This could cause the river to move slower in some cases or erode more in other cases.

Explanation:

summary of answer:

influencing the amount of friction between the water flowing through the river and the stream bed below.

The 25-pound ter- rier on mars weighs more.

The given parameters:

The acceleration due to gravity on Pluto and Mars is calculated as follows;

The weight of the objects on different planet;

Thus, the 25-pound ter- rier on mars weighs more.

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Answer:

The ratio of the potential difference across a metallic conductor to the current in the conductor is known as.

B. Resistance.

Explanation:

According to ohms law   " the current  passing through a conductor is directly proportional to the potential difference between the ends provided the temperature of the wire remains constant".

What is resistance ?

Resistance is a measure of the opposition to current flow in an electrical circuit

what is a resistor ?

a resistor is a n electric conductor which forms resistance to free flow of electric current, the resistance is measured in Ω

The ratio of the potential difference across the conductor to the current is called resistance

It is defined as the ratio of the potential difference across the conductor to the current. The resistance is measured in Ω.

\(R = \dfrac VI\)

Where,

\(R\) - resistance

\(V\)- voltage (Potential difference)

\(I\) - current

Therefore, the ratio of the potential difference across the conductor to the current is called resistance.

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Answer:

Bohr’s

Explanation:

Answer:

A

Explanation:

The statements about limiting frictional force between two surfaces are given below(3) A and C is correct option.

The nature of surfaces in contact affects the limiting frictional force because the coefficient of friction depends on the properties of the surfaces in contact.

The area of surfaces in contact also affects the limiting frictional force because a larger surface area in contact results in a larger normal force, which increases the maximum frictional force that can be generated.

The normal reaction between the surfaces in contact is not directly related to the limiting frictional force, as it only affects the magnitude of the frictional force and not its limit. Therefore, statement B is not correct.

Thus the correct option is (3).

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The Doppler shift approaches 0 as the listener's speed approaches the speed of sound.

In part f of the question, when the source is stationary and the listener is moving towards the source at the speed of sound, the formula for the Doppler shift becomes:

\(fl = fsv + vlv + vs\)

Since the source is stationary (vs = 0) and the listener's speed (vl) approaches the speed of sound (v), the term vlv approaches v². Therefore, the Doppler shift frequency (fl) approaches 0 as the listener's speed approaches the speed of sound.

Hence, the answer to part f is a) 0.

In part g, when the listener is stationary and the source is moving towards the listener at the speed of sound, the formula for the Doppler shift remains the same:

\(fl = fsv + vlv + vs\)

In this case, since the listener is stationary (vl = 0) and the source is moving towards the listener at the speed of sound (vs = v), the term vsv becomes v². Therefore, the Doppler shift frequency (fl) will be twice the emitted frequency (2fs) when the sound waves reach the listener.

Hence, the answer to part g is c) 2fs.

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When you walk, you are more likely to be able to walk at a constant velocity. Your walking speed varies as you walk in real-life scenarios, but you aim to maintain a steady pace or velocity. This is how you can keep track of time and distance traveled.

When you walk at a constant velocity, you move forward with a steady speed and direction. The velocity is defined as the rate at which an object's position changes with respect to time. When you walk, you typically aim to move forward with a constant velocity, which is the speed at which you walk and the direction you walk. In certain situations, a constant velocity is ideal, such as when you are traveling long distances and want to arrive at your destination at a certain time. To ensure that you walk at a constant velocity, you need to maintain a steady pace by keeping your stride consistent and avoiding unnecessary stops or changes in direction. Walking with a constant velocity involves maintaining a steady speed and direction. It is possible to achieve this by maintaining a constant pace, keeping your stride consistent, and avoiding any unnecessary stops or changes in direction.

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The time taken by the red blinky car is 0.75sec.

It is possible to define time as the dimension on which any system evolves. Its length can be expressed in terms of milliseconds, seconds, minutes, hours, days, weeks, months, and years.

We are given that,

The speed of red blinky car = v = 2.0m/s

The length of the race track = d = 1.5m

Therefore, the time taken by the car can be calculated by ,

V = d/t

Where, V is the speed of the car , d is the distance cover by the car and t is the time taken by the car.

t = d/v

t = (1.5m)/(2.0m/s)

t = 0.75s

Therefore, the red blinky car would be started in 075sec to win the race.

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The hour angle of Betelgeuse can be calculated by determining the difference between the local sidereal time (LST) and the right ascension (RA) of the star. LST is determined based on the observer's longitude and the current date and time. By subtracting the RA of Betelgeuse from the LST, we can find its hour angle.

To calculate the hour angle of Betelgeuse, we first need to determine the local sidereal time (LST). LST represents the time measured with respect to the apparent motion of the stars. It is influenced by the observer's longitude and the current date and time.

Once we have the LST, we can find the hour angle by subtracting the right ascension (RA) of Betelgeuse from it. Right ascension is a celestial coordinate that measures the east-west position of a celestial object.

In this case, Betelgeuse has a right ascension of 05h55m. To convert this to decimal hours, we can divide the minutes (m) by 60 and add it to the hours (h). Therefore, the RA of Betelgeuse is approximately 5.917 hours.

To determine the LST, we would need the observer's longitude and the current date and time. Without this information, we cannot provide an accurate calculation for the hour angle of Betelgeuse. However, once you have the LST, you can subtract the RA of Betelgeuse from it to obtain the hour angle of the star.

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Answer:

the vertical velocity is constant.

Explanation:

The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; thus, the vertical velocity of a projectile changes. and the horizontal motion of a projectile is independent of its vertical motion.

Both path integrals and Hamiltonian physics are fundamental in quantum mechanics, but they are used in different ways and for different purposes.

Path integrals, also known as the Feynman path integral formulation, is a formulation of quantum mechanics that provides a way to calculate the probability amplitude of a particle's path in space-time. It is used to calculate the probability of a particle going from one point to another in a given time and is useful for studying quantum systems with a large number of degrees of freedom.

Hamiltonian physics, on the other hand, is a formulation of classical mechanics that describes the evolution of a system in terms of its energy. In quantum mechanics, the Hamiltonian is used to describe the time evolution of a quantum system and is the operator corresponding to the total energy of the system.

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Answer:

B

Explanation:

The only force acting on the block is gravity, so the block has a constant, negative acceleration. This means the velocity of the block is decreasing at a constant rate, so the answer is B, D, or E. Velocity is the rate of change of displacement, and answer choice B is the only one that has a displacement graph that matches that idea.

Answer: Graph B here correctly describes the displacement and velocity of the object during the time the object is falling. Option B is correct.

It is given that the mass of an object is dropped from height 'h' above the ground and "up" direction is taken to be positive.

It is required to find the graph which describes the displacement and velocity of the object during the time the object is falling.

If any body falls freely towards the ground, then its acceleration is decreasing constantly with respect to time. That means velocity of an object will also be decreased as shown in graph B. Also we know that velocity is the rate of change of displacement.

As it is given in question that up direction is positive then it is also considered that downward be negative means decreasing.

Therefore, both the quantities are decreasing. So graph B correctly describes the displacement and velocity of the object during the time the object is falling.

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The distance between two wavefronts is termed as wavelength.

The wavelength of a sound wave is defined as the space between two adjacent wavefronts. The number of wavefronts the observer detects during a period of time can be used to calculate the wave's frequency.

The medium (such as a vacuum, air, or body of water) through which a wave travels determines its wavelength. Waves can be anything from music to light to water to periodic electrical signals. While light and other electromagnetic radiation use variations in electric and magnetic field strength, sound waves are variations in air pressure. Water waves are fluctuations in a body of water's height. Atomic locations change during the shaking of a crystal lattice.

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By utilizing the idea of parallax, we can decide how cosmologists decide distances to stars.

Presently, we perceive how parallax estimations can be utilized to decide the distances, one of the realities we know is that if we have any desire to gauge the distance of divine bodies, we are familiar with the parallax, first and foremost, point. That's what it intends assuming we can quantify tiny parallax points, we can gauge enormous distances moreover.

The purpose for why we can not make precise estimations of parallax past a specific distance is that as the distance of the star from earth builds the parallax point turns out to be tiny.

Subsequently, presently we comprehend how parallax estimations are utilized.

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Based on the information that the speed

A force vector with magnitude 750 N and angle 30⁰ can be written as a Cartesian vector as: F = 375√3 i + 375 j

A vector can be written as its x-component and y-component.

Suppose the angle of a vector F with the positive x-axis is θ, then its components are given by:

Fx = F cos θ

Fy = F sin θ

Then,

F = Fx i + Fy j

  = F cos θ i + F sin θ j

In the given problem, θ = 30⁰, F = 750.

Hence,

Fx = 750 cos 30⁰

    = 750 (1/2)√3 = 375√3

Fy = 750 sin 30⁰

   = 750 (1/2) = 375

Thus, the vector can be written as a Cartesian vector:

F = 375√3 i + 375 j

Your question is incomplete, most likely your question was:

Express the force as a Cartesian vector. F 750 N. The angle of the force vector with the horizontal is 30⁰.

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The speed of the block after the 2,60 m is determined as 6.38 m/s.

The work done on the block is calculated by applying the principle of Newton's second law of motion to determine the net work done on the block as shown below.

W = F(net)d

where;

F(net) = Fcosθ - Ff

where;

F(net) = 50 cos(30) - 4.2

F(net) = 39.1 N

The speed of the block is calculated by applying the principle of work energy theorem.

K.E = W

¹/₂mv² = F(net)d

mv² = 2F(net)d

v² = [2F(net)d] / m

v = √[2F(net)d] / m]

v = √[2 x 39.1 x 2.6] / 5]

v = 6.38 m/s

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The solar system shows the planets in their orbits around the sun in this order: Mercury, Venus, Earth with Moon, Mars, Jupiter, Saturn. Fixed stars are around the outside of the orbit of Saturn.

Explanation:

Aristarchus of Samos was an ancient Greek astronomer and mathematician who presented the first known heliocentric model that placed the Sun at the center. So I had to choose the choice that was most similar to that.

The buoyant force exerted on the rock is 2 N.

Buoyancy is the upward force exerted by a liquid that opposes the weight of a partially or fully submerged object. In a liquid column, the pressure increases with depth due to the weight of the liquid above. Buoyancy exists whether an object is floating or submerged. The SI unit of buoyancy is Newton. The factors on which buoyancy depends are:

For the given case,

Weight of the rock out of water (W₀) = 5N

Weight of the rock when submerged in water (Wₙ) = 3N

Now what decreases the weight of rock in water? It is the buoyant force exerted by water, which can be can be calculated as:

Fᵇ = W₀ - Wₙ

Fᵇ = 5N - 3N

Fᵇ = 2N

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