A race car has a mass of 710 kg. It starts from rest and travels 40 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is applied to it
Answers
The net force applied to it is 6311.9 N.
To calculate the net force to the car, first, we need to find the acceleration using the equation of motion.
Force: This as be defined as the product of mass and acceleration of a body. The S.I unit of force is Newton (N)
⇒ Formula
S = ut+at²/2................. Equation 1⇒ Where:
u = Initial velocityS = Distancet = Timea = accelerationFrom the question,
⇒Given:
S = 40 mt = 3.0 su = 0 m/s (at rest)⇒ Substitute these values into equation 1
40 = 0(3)+a(3²)/2⇒ Solve for a
9a = 80a = 80/9a = 8.89 m/s²⇒ To get the force, we use the formula below
F = ma .................... Equation 2⇒ Where:
F = Force appliedm = mass of the car⇒ Given:
m = 710 kga = 8.89 m/s²⇒ Substitute these values into equation 2
F = 710(8.89)F = 6311.9 NHence the net force applied to it is 6311.9 N.
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Related Questions
What does it mean when an
electromagnetic wave has low energy?
A. it has a long wavelength
B. It has a short wavelength
C.it has a short amplitude
D. It has a high frequency
Answers
Answer:
A
Explanation:
Low energy photons (such as radio photons) behave more like waves, while higher energy photons (such as X-rays) behave more like particles.
Please give brainliestAnswer:
B. It has a short amplitude.
:)
A strong gust of wind hits a falcon coasting through the sky. The force of the wind on the falcon is 1.3 N, and the wind blows for 1.8 s. What is the magnitude of change to the falcon’s momentum?
A. 0.87 kg m/s
B. 1.2 kg m/s
C. 1.9 kg m/s
D. 2.3 kg m/s
Answers
Answer:
2.3 kg m/s
Explanation:
a baseball mass 220.00 g approaches a bat horizontally at a speed of 32.20 m/s and is hit straight back at a speed of 54.50 m/s . if the ball is in contact with the bat for a time of 1.50 ms, what is the average force exerted on the ball by the bat? neglect the weight of the ball, since it is so much less than the force of the bat. choose the direction of the incoming ball as the positive direction.
Answers
According to the given statement F = -12716 N is the average force exerted on the ball by the bat.
What does "average force" mean?The average force is the force applied by an object traveling over a specific period of time at a given rate of speed, or velocity. This velocity is not immediate or precisely calculated, even as word "average" implies.
Briefing:m = 220 g = 0.22 kg
v\(_1\) = 32.20m/s
v\(_2\) = -54.50 m.s
t = 1.5 ms = 1.5 * 10⁻³
To find the average force exerted on the ball.
If we use the impulse-momentum theorem,
F = mv\(_2\) - mv\(_1\)/t
Now, we have to substitute values in equation 11:
\($F=\frac{0.22 \mathrm{~kg} \cdot\left(-54.5 \frac{\mathrm{m}}{\mathrm{s}}\right)-0.22 \mathrm{~kg} \cdot\left(32.2 \frac{\mathrm{m}}{\mathrm{s}}\right)}{1.5 \cdot 10^{-3} \mathrm{~s}}$\)
F = -12716 N
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A ceiling fan with 80-cm-diameter blades is turning at 60 rpm.Suppose the fan coasts to a stop 25s after being turned off.
a.) What is the speed of the trip of a blade 10 s after thefan is turned off?
b.) Through how many revolutions does the fan turn whilestopping?
Answers
The speed of the trip of a blade 10 s after the fan is turned off is 2.51 m/s and 25 revolutions does the fan turn while stopping.
a) The speed of the tip of a blade 10 seconds after the fan is turned off can be calculated by considering the angular velocity and the radius of the blades. The fan initially rotates at 60 revolutions per minute, which is equivalent to 1 revolution per second or 2π radians per second. The radius of the blades can be calculated by dividing the diameter (80 cm) by 2, resulting in a radius of 40 cm or 0.4 meters. Therefore, the speed of the tip of the blade can be calculated by multiplying the angular velocity (2π rad/s) by the radius (0.4 m), which gives us a speed of 0.8π m/s or approximately 2.51 m/s.
b) The number of revolutions the fan makes while stopping can be determined by calculating the change in angular displacement. The fan takes 25 seconds to coast to a stop after being turned off. Since the initial angular velocity is 2π rad/s, the total angular displacement can be calculated by multiplying the initial angular velocity by the time taken, resulting in an angular displacement of 50π radians. Since one revolution is equal to 2π radians, the number of revolutions made by the fan while stopping is 50π / 2π = 25 revolutions.
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a rocket blasts off. in 10.0 seconds it's at 10,000 ft, traveling at 3600 mph. assuming the direction is up, calculate the acceleration. (hint: the rocket is not under constant acceleration)
a) 5280 ft/s^2
b) 528 ft/s^2
c) 100 ft/s^2
d) 200. ft/s^2
Answers
If a rocket blasts off. in 10.0 seconds it's at 10,000 ft, traveling at 3600 mph. assuming the direction is up, the acceleration of the rocket is 528 ft/s². T
The correct answer is option (b)
How do we calculate?a = Δv / Δt
a = acceleration
Δv = change in velocity
Δt = change in time.
1 mile = 5280 feet
1 hour = 3600 seconds
3600 mph = 3600 * 5280 ft / 3600 s = 5280 ft/s
Therefore , a = Δv / Δt substituting these, we have:
a = Δv / Δt = (5280 ft/s - 0 ft/s) / 10.0 s
a= 528 ft/s²
In conclusion, the acceleration of the rocket is 528 ft/s²
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An archer performs 100 joules of work in pulling back the string of a bow. What will be the initial speed of a 0. 5-kilogram arrow when it is fired from the bow?.
Answers
The initial speed of a 0.5 kg arrow when it is fired from the bow is equal to 20 m/s.
What is kinetic energy?Kinetic energy can be described as the energy carried by a moving body due to its motion. Work should be done on the object in order to bring the change in the kinetic energy of a moving object.
The kinetic energy of an object can be determined from the mathematical formula:
K.E. = ½ mv²
Where ‘v’ is the object's velocity and ‘m’ is the object's mass.
Given, the mass of the arrow, m = 0.5 Kg
The work done = kinetic energy = 100 J
The kinetic energy = (1/2)× m ×(v)²
100 = (1/2)× 0.5 ×(v)²
v² = 400
v = 20 m/s
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fill in the blank. * a within subjects experiment is used to the the effect of light colour on mood. The experiment has a single light bulb with three different ambient colour schemes. The experiment features three rooms each with a different light bulb, there are ___ factors in this experiment.
1
Answers
Two factors. The independent variable is the light colour and the dependent variable is the mood. The ambient colour is not a factor as it is being controlled in each room.
A within-subjects experiment is used to assess the effect of light colour on mood. The experiment has a single light bulb with three different ambient colour schemes. The experiment features three rooms each with a different light bulb, there are factors in this experiment.
In this within-subjects experiment designed to assess the effect of light colour on mood, there is 1 factor being manipulated, which is the ambient colour of the light bulb.
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Look at SS and answer
Answers
You can see it starts at (0,0)
A simple pendulum makes 10 oscillations in 20 seconds. What is the time period and frequency of its oscillation? with steps and formula
Answers
Answer:
When a simple pendulum makes 10 oscillation in 20 seconds, the time taken for each osillation
=20/10
= 2seconds
hence, as the time period is calculated to be 10secondd, the frequency of oscillation
=1/T
=1/2
= 0.5 here's
A ball is dropped off a very tall canyon ledge.
How fast is the ball traveling after 5
seconds?
Answers
Answer:
V = 49.05 [m/s]
Explanation:
We can easily find the result using kinematics equations, first, we will find the distance traveled during the 5 seconds.
\(y =y_{o}+(v_{o}*t)+(\frac{1}{2}*g*t^{2} )\)
where:
Yo = initial position = 0
y = final position [m]
Vo = initial velocity = 0
t = time = 5 [s]
g = gravity aceleration = 9.81 [m/s^2]
The initial speed is zero, as the body drops without imparting an initial speed. Therefore:
y = 0 + (0*5) + (0.5*9.81*5^2)
y = 122.625[m]
Now using the following equation we can find the speed it reaches during the 5 seconds.
\(v_{f} ^{2}= v_{i} ^{2}+(2*g*y)\\v_{f}=\sqrt{2*9.81*122.625} \\v_{f}=49.05 [m/s]\)
Your summer job working for a lab requires the testing of metal alloys for purity. One check on this is to measure the density of a sample. A given sample is weighed and found to weigh 6.40 N as
measured when the object is suspended from a spring scale as An picture window on a home has a single piece of glass 0.61 cm thick and is of size 1.3 m × 2.2 m. Picking a cold winter day in Minnesota, you assume the indoor temperature is 24°C and the outdoor temperature is -25°C. The sample is then moved to be suspended from the scale while submerged in pure water. Here the scale reads 3.36 N. Find the density of the object.
Answers
Using principle of buoyancy, the density of the metal alloy sample is 215 kg/m³.
To find the density of the metal alloy sample, we need to use the principle of buoyancy, which states that the weight of an object in a fluid is reduced by the weight of the fluid displaced by the object. We can use the weight of the object in air and the weight of the object in water to find its volume and then use its mass to calculate its density.
First, we need to find the volume of the object. We can use the density of water, which is 1000 kg/m³, and the weight of the object in water to calculate the volume of water displaced by the object:
Volume of water displaced = Weight of object in air - Weight of object in water
Volume of water displaced = 6.40 N - 3.36 N
Volume of water displaced = 3.04 N
Since the density of water is 1000 kg/m³, the volume of water displaced by the object is equal to the volume of the object. Therefore, we have:
Volume of object = Volume of water displaced = 3.04 x 10⁻³ m³
Next, we need to find the mass of the object. We can use the weight of the object in air and the acceleration due to gravity, which is approximately 9.81 m/s², to find its mass:
Mass of object = Weight of object in air / Acceleration due to gravity
Mass of object = 6.40 N / 9.81 m/s²
Mass of object = 0.653 kg
Finally, we can use the mass and volume of the object to calculate its density:
Density of object = Mass of object / Volume of object
Density of object = 0.653 kg / 3.04 x 10⁻³ m³
Density of object = 215 kg/m³
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There is a small population of 500 loaches living in the shallows along the edge of a lake consisting of 264 white Toaches (WW), 46 gray loaches (Ww), and 190 black loaches (ww). What is the OBSERVED
Answers
The observed population of loaches in the lake consists of 264 white loaches (WW), 46 gray loaches (Ww), and 190 black loaches (ww).
In the given population of loaches, the observed distribution is as follows:
- 264 white loaches (WW)
- 46 gray loaches (Ww)
- 190 black loaches (ww)
The distribution of loaches is described using the Hardy-Weinberg principle, which provides insights into the genetic composition of a population. In this case, the distribution can be analyzed based on the presence of two alleles for color: W (white) and w (black).
The genetic makeup of the loaches in the observed population can be inferred as follows:
- The 264 white loaches (WW) are homozygous for the white allele (W) and have a white phenotype.
- The 46 gray loaches (Ww) are heterozygous, carrying one copy of the white allele (W) and one copy of the black allele (w), resulting in a gray phenotype.
- The 190 black loaches (ww) are homozygous for the black allele (w) and have a black phenotype.
This distribution of loach colors provides insights into the genetic diversity and inheritance patterns within the population.
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the blocks shown below are placed on a smooth horizontal surface and connected by a piece of string. if a 8.8-n force is applied to the 8.8-kg block, what is the tension in the string?
Answers
When a 8.8 N force is applied to the 8.8 kg block connected to another block by a string, the tension in the string can be determined. The tension in the string is equal to the applied force because the blocks are connected and the system is in equilibrium.
In this scenario, the blocks are connected by a string, and the system is at rest on a smooth horizontal surface. When an external force is applied to one of the blocks, it creates tension in the string, which is transmitted to the other block.
Since the system is in equilibrium, the tension in the string must be equal to the applied force. This is because, in equilibrium, the net force acting on each block is zero. The tension in the string balances the applied force and prevents any acceleration or motion of the blocks.
Therefore, the tension in the string is 8.8 N, which is equal to the applied force. This ensures that the system remains in equilibrium, with no net force acting on either block.
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The mass after a physical change, such as ice melting into water, stays the same a. -true b. -false.
Answers
Answer:
Yes, it can be destroyed.The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.
Explanation:
hope this helps
The ___ of an object changes when you take it to a different planet.
Answers
Answer:
weight
Explanation:
weight depends on gravity
Hi.
I need help with this question :
A piece of copper of mass 40g at 200°C is placed in a copper calorimeter of mass 60g containing 50g of water at 25°C. Ignoring heat losses, what will be the final temperature of the mixture.
(Specific heat capacity of copper= 0.4J/g/K, specific heat capacity of water= 4.2J/g/K )?
Please show workings.
Answers
Let the final temperature be "T".
For the piece of copper :
mass, \(\sf{m_c=40\ g.}\)specific heat capacity, \(\sf{c_c=0.4\ J\,g^{-1}\,K^{-1}.}\)initial temperature, \(\sf{T_c=200^{\circ}C.}\)Then the heat of copper :
\(\sf{\dashrightarrow Q_c=m_cc_c\,\Delta\!T_c}\)
\(\sf{\dashrightarrow Q_c =16(T-200)\ J}\)
For copper calorimeter :
mass, \(\sf{m_{cc} =60\ g.}\)specific heat capacity, \(\sf{c_{cc} =0.4\ J\,g^{-1}\,K^{-1}.}\)initial temperature, \(\sf{T_{cc} =25^{\circ}C.}\)Then the heat of copper calorimeter :
\(\sf{\dashrightarrow Q_{cc} =m_{cc}c_{cc}\,\Delta\!T_{cc}}\)
\(\sf{\dashrightarrow Q_{cc} =24(T-25)\ J}\)
For water :
mass, \(\sf{m_w=50\ g. }\)specific heat capacity, \(\sf{c_w= 4.2\ J\,g^{-1}\,K^{-1}.}\)initial temperature, \(\sf{T_w=25^{\circ}C.}\)Then heat of water :
\(\sf{\dashrightarrow Q_w=m_wc_w\,\Delta\!T_w}\)
\(\sf{\dashrightarrow Q_w=210(T-25)\ J}\)
By energy conservation, the sum of all these energies should be zero as there were no heat energy change before the process, i.e.,
\(\sf{\dashrightarrow Q_c+Q_{cc}+Q_w=0}\)
\(\sf{\dashrightarrow16(T-200)+24(T-25)+210(T-25)=0}\)
\(\sf{\dashrightarrow 250T- 9050=0}\)
\(\sf{\dashrightarrow T=36.2^{\circ}C}\)
\( \large \underline{\underline{\boxed{\sf T=36.2^{\circ}C}}}\)
____________________________
[Note: in case of considering temperature difference it's not required to convert the temperatures from \(\sf{^{\circ}C}\) to K or K to \(\sf{^{\circ}C}\).]
the intensity of an em wave is 10 w/m2. what will the intensity be if the amplitude of the electric field is doubled?
Answers
The new intensity is 4 times the original value. Thus, if the intensity of the em wave was initially 10 W/m², it will be 40 W/m² when the amplitude of the electric field is doubled.
The intensity of an em wave is given as 10 W/m². If the amplitude of the electric field is doubled, the new intensity will be 4 times the original value. Hence, the intensity of the em wave will be 40 W/m².An electromagnetic wave consists of two perpendicular and transverse oscillations which are the electric field and magnetic field respectively. The two fields are perpendicular to the direction of propagation of the wave which means they are both oscillating in a plane perpendicular to the wave’s direction of travel.
The intensity of an electromagnetic wave is proportional to the square of its electric field amplitude. The formula to calculate the intensity is given as;I = E²/2μ where;I = IntensityE = Electric field amplitudeμ = Permeability of free space .
When the amplitude of the electric field is doubled, it means that the new amplitude is twice the original value. Thus, the new intensity can be calculated as follows; E_new = 2E_old Substituting the above value into the formula for intensity gives; I_new = (2E_old)²/2μ = 4(E_old²/2μ) = 4I_old .
Therefore, the new intensity is 4 times the original value. Thus, if the intensity of the em wave was initially 10 W/m², it will be 40 W/m² when the amplitude of the electric field is doubled.
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Explain the relationship between gravity and weight.
Answers
Explanation:
The gravity equation defines the relationship between weight, mass, and gravity:
W = mg
Hello please just answer question one for me!
Answers
Answer:
See below
Explanation:
No energy has been added to the system to make it swing higher than from where it was released....actually....some energy has been LOST in the system due to air friction, so the balloon will not swing QUITE as high as from where it was released.
Imagine repeating the timing experiments you ran in this lab, only this time starting with a partially-charged capacitor. Describe how the timings differ from above. Explain how this difference originates from specific electrical quantities in the circuit (e.g. charge, voltage, etc.).
Answers
The timing experiments with a partially-charged capacitor result in shorter charging and discharging times, and the voltage across the capacitor starts at a certain level determined by the initial charge.
How do timing experiments differ with a partially-charged capacitor?When repeating the timing experiments with a partially-charged capacitor, the differences can be summarized in the following points:
Charging Time:
Shorter compared to starting with a fully discharged capacitor.Capacitor already holds some charge, requiring less time to reach the desired voltage level.Higher initial charge leads to a shorter charging time.Voltage Rise:
Capacitor starts with a certain voltage level determined by the initial charge.Voltage across the capacitor increases until it reaches the supply voltage.Rate of voltage rise depends on circuit parameters like resistance and capacitance values.Discharging Time:
Discharge process starts from a higher voltage level compared to starting with a fully charged capacitor.Shorter discharging time compared to starting from a fully charged capacitor.Timing Dependency:
Specific timings depend on circuit parameters such as resistance, capacitance, and initial charge on the capacitor.Interaction between these quantities determines the behavior of the circuit and resulting timing measurements.Learn more about capacitor
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Which statements describe a situation in which work is being done? Select three options.
Answers
Answer:
here's the answers!
Explanation:
A mover carries a box up a flight of stairs.
A mover carries a box across a room.
A weightlifter lifts a barbell off the ground.
hope it helps u!
Answer:
A, D, E
Explanation:
Did it
A wave pulse travels along a horizontal string. As the pulse passes a pint on the string, the point moves vertically up and then back down again. How does the vertical speed of the point compare to the speed of the wave?
• the speed of the point equals the speed multiplied by the wavelength and divided by the string's length.
• the wave speed equals the point speed multiplies by the wavelength and divided by the string's length.
• the speed of the point is 2 times greater than the wave speed.
• the speed of the point could be neglected compared to the wave speed.
• the wave speed could be neglected compared to the speed of the point.
• the speeds could not be uniquely compared, because there is no fixed relationship between them.
Answers
Answer:
The vertical speed of the point is not directly related to the wavelength, but rather to the amplitude of the wave. Therefore, none of the options given are correct.
However, we can say that the vertical speed of the point depends on the frequency of the wave and the amplitude of the wave. The higher the frequency and/or amplitude of the wave, the greater the vertical speed of the point.
On the other hand, the speed of the wave is determined by the properties of the string, such as its tension and mass density. Therefore, the speeds of the point and the wave are not directly related, and cannot be compared in a fixed way.
How to describe the motion, and velocity of a moving man
Answers
Answer:
You can describe the motion of an object by its position, speed, direction, and acceleration. An object is moving if its position relative to a fixed point is changing. Even things that appear to be at rest move.
Explanation:
pls awnser short i need awnsers
Answers
Answer:
4. 0.12mm
5:
a. screw gauge
b. caliper
Answer:
0.11 mm
vernier calipers
im not sure about the sure about B
Explanation:
INQUIRY LAB
HOW DO You Breathe?
Use and manipulate an improvised breathing apparatus similar to the
one shown at the right in answering the following questions:
Pull down the string attached to the center Of the large balloon.
1.What happened to the two small balloons attached to the capillary tube?
2.When the large balloon is not yet stretched or pulled down, how do the two small balloo
appear?
3.How does the improvised breathing apparatus simulate the breathing process?
plss can u help me with thiss its realy a lot of help THANK YOU SO MUCHH
Answers
Answer:
u breathe lol nice ok bro
which of these might be carried by the wind, which causes the weathering of rocks?
A. fog
B. mud
C. pollen
D. sand
BTW SCIENCE ISN'T IN SUBJECTS JUST SAYING
Answers
A .
Explanation:
Tiny water drops hovering in the air are called fog. Fog is like a cloud, but it is near the ground, not high in the sky. Thick fog makes it difficult to see the surrounding landscape
we have that from the Question"which of these might be carried by the wind, which causes the weathering of rocks? " it can be said that
Which of these might be carried by the wind, which causes the weathering of rocks will bepollen Option CFrom the Question we are told
which of these might be carried by the wind, which causes the weathering of rocks?
A. fog
B. mud
C. pollen
D. sand
Generally
wind carry light and thing above the earth or at a higher altitudewhen pollen's are carried over a distance and germinate the root them self into rocks and as the grow bigger the crack rocks thereby causing the weathering of rockTherefore
Which of these might be carried by the wind, which causes the weathering of rocks will be
pollenOption C
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to identify all the approximately 20,000 to 25,000 genes in human DNA.
Answers
To identify all the approximately 20,000 to 25,000 genes in human DNA, scientists use a combination of technique such as DNA sequencing, genome annotation, gene expression analysis, and comparative genomics.
The identification of genes in human DNA involves a multi-step process. It typically begins with DNA sequencing, which generates the raw sequence data. This data is then analyzed and compared to known gene sequences using computational methods. Genome annotation tools are used to identify coding regions and regulatory elements within the DNA sequence. Gene expression analysis technique, such as RNA sequencing, help determine which genes are actively transcribed in specific tissues or under certain conditions. Comparative genomics, comparing DNA sequences across different species, aids in identifying conserved genes and their functions. These techniques collectively contribute to the identification of the thousands of genes in the human DNA.
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URGENT!!!
Calculate the frequency of violet light if the wavelength in air is 430nm.
* speed.of violet light in the prism = 2×10^8 m/s
* 1nm = 10^-9
* velocity of light in air = 3×10^8 m/s
Answers
Answer:
\(f=6.97\times 10^{14}\ Hz\)
Explanation:
Given that,
Wavelength, \(\lambda=430\ nm=430\times 10^{-9}\ m\)
We need to find the frequency of the violet light.
We know that the relation between frequency and wavelength is given by :
\(f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{430\times 10^{-9}}\\\\f=6.97\times 10^{14}\ Hz\)
So, the frequency of violet light is \(6.97\times 10^{14}\ Hz\).
g two pool balls, each moving at 2 m/s, roll toward each other and collide. suppose after bouncing apart, each moves at 2 m/s. assume the positive direction is to the right. this collision violates conservation of group of answer choices kinetic energy momentum both kinetic and momentum none of the above
Answers
This collision violates conservation of both energy and momentum i.e, third option is correct.
According to the law of conservation of momentum, when two bodies collide their total momentum and energy before and after collision are equal.
According to the law of conservation of energy, energy can neither be created nor destroyed. However, it can be transformed from one form to another. It is also known as the first law of thermodynamics.
Given that, the two bodies move with same velocities after collision, means that the law has not been violated since, momentum = mass*velocity (where mass is said to be constant)
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Calvin is running down the sidewalk at 6 m/s. If he has a mass of 65 kg, what is his kinetic energy?
Answers
Answer:
1,170
Explanation:
Kinetic energy=1/2×m×velocity squared