Kinetic Energy Answers
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Which best summarizes a concept related to the work-energy theorem?
A
When work is positive, the environment does work on an object.B
When work is negative, the environment does work on an object.C
When work is positive, the kinetic energy in a system remains constant.D
When work is negative, the kinetic energy in a system remains constant.3
What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? Round to 3 significant figures.
A
2,790 JB
5,580 JC
25,100 JD
50,200 J5
A 20.0 kg object is at rest, and then speeds up to 16.0 m/s. How much work was done on this system?
A
320 JB
2,560 JC
2,880 JD
5,120 J6
Four vehicles are traveling on the same road. Which vehicle most likely has the greatest kinetic energy?
A
a compact car traveling at a velocity of 10 m/sB
a pickup truck traveling at a velocity of 25 m/sC
a minivan traveling at a velocity of 10 m/sD
a motorcycle traveling at a velocity of 25 m/s7
The diagram shows a side view of a skateboard ramp.
A
W and XB
X and YC
Y and ZD
W and Z10
If all else is constant, which would cause the greatest increase in kinetic energy of a moving object?
A
Mass and velocity are each reduced by one-half.B
Mass is reduced by one-half, and velocity is doubled.C
Mass is doubled, and velocity is reduced by one-half.D
Mass and velocity are each doubled.Did you find these answers helpful?
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