Energy Practice

Potential energy depends on the ________ and ________ of the object.

• Height (position)

• Mass

• Speed

• Friction

At which point of the roller coaster is potential energy the greatest?

• W

• X

• Y

• Z

What is energy?

• rate of work
• Motion of an object
• ability to do work
• force over time

Kinetic energy depends on the ________ and ________ of the object.

• Height (position)

• Mass

• Speed

• Friction

2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?

• 1
• 2
• 3
• 4

You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a speed of 30 m/s. What is the KE of the ball?

• 900 J
• 1800 J
• 60 J
• 30 J

There is a bell at the top of a tower that is 45 m high. The bell weighs 100 kg. What is the potential energy of the bell?

• 980 J
• 441 J
• 4,500 J
• 44,100 J

What is the correct unit for energy?

• meters (m)

• kilogram meters per second (kg m/s)

• Newtons (N)

• Joules (J)

An 2 kg coconut is hanging in a tree, 10 m off the ground. What is the gravitational potential energy of the coconut?

• 19.6 J

• 20 J

• 98 J

• 196 J 

What is the mass of a moving object that has 100 Joules of KE and moves at a velocity of 2 m/s?

• 50 kg
• 200 kg
• 25 kg
• 100 kg