Energy

True or False: A person running 3m/s has less kinetic energy than a car driving 3m/s. 

• True

• False

A 10-kg block of ice is set into motion on a frictionless surface. It attains a speed of 8 m/s at point  X.

What is the kinetic energy of the ice at point  X?

KE=½mv²

• 320 J

• 80 J

• 40 J

• 640 J

What is the gravitational potential energy acquired by an object with a mass of 10 kilograms when it is raised 12 meters?

GPE=mgh

• 1,176 J

• 120 J

• 720 J

• 1,440 J

A roller coaster car moves on a roller coaster track through positions  W, X, Y, and  Z.

At what point is the potential energy the greatest?

• W

• X

• Y

• Z

True of False: The law of conservation of energy states that energy cannot be created or destroyed only transformed from one form to another.

• True

• False

Which has the most potential energy?

• a two-pound brick two feet off the ground

• a two-pound brick six feet off the ground

• a four-pound brick two feet off the ground

• a four-pound brick six feet off the ground

An object has _______ energy if it is moving.

______ is the ability to cause change.

Speed and ____ determine how much kinetic energy an object has.

________ and mass determine how much potential energy an object has.