Lab: Kinetic Energy Answers
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A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller coaster? (Formula: PE = mgh)
A
800 kgB
7,840 kgC
8,000 kgD
78,400 kg2
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The diagram shows a person holding a bow and arrow.
A
pulling farther back on the stringB
releasing the stringC
holding the arrow higherD
decreasing the mass of the arrow3
Which two factors are used to calculate the kinetic energy of an object?
g
gravity and velocityv
velocity and massm
mass and volumev
volume and height4
What is the kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s? (Formula:)
2
25 J5
5 J5
50 J1
100 J5
Let's consider a scenario of a roller coaster ride. As the roller coaster at the top begins to descend, it loses height, which means its potential energy decreases and kinetic energy starts increasing and reaches its maximum value.By using the above scenario, which statement best compares potential and kinetic energy?
A
Objects always have more potential energy than kinetic energy.B
Kinetic energy increases and potential energy decreases when the velocity of an object increases.C
Only potential energy decreases when an object’s height increases.D
Objects always have more kinetic energy than potential energy.Did you find these answers helpful?
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