Quizs: KE PE

Which of these is an example of the conversion of kinetic energy into gravitational potential energy?

• a bicyclist coasting down a long hill

• a car engine moving the car forward

• a roller coaster car moving toward the top of a rise in the tracks

• a thrown ball falling toward the ground after passing through the top part of its motion

When a roller coaster is at the top of a hill it has

• high potential energy

• high kinetic energy

• low potential energy

• equal amounts of kinetic and potential energy

The law of conservation of energy describes how the amount of total energy can change in a closed system. Which of these statements correctly describes this law?

• The amount of kinetic energy in a system is a constant value.

• Energy can be converted from one form into another, but it cannot be created or destroyed.

• An object can have potential energy or kinetic energy, but not both at the same time.

• The amount of energy created when an object moves is equal to the energy destroyed when it stops moving.

True/False: Because energy cannot be created or destroyed, when an object’s kinetic energy increases, its potential energy must decrease!

• True

• False

When a roller coaster is at the bottom of a hill it has

• high potential energy

• high kinetic energy

• low kinetic energy

• equal amounts of kinetic and potential energy

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

__________ is stored energy. 

• Potential
• Kinetic
• None of the above 
• All of the above 

Which of the following demonstrates an airplane converting kinetic to potential energy?

• It ascends to a higher altitude.

• More passengers board the plane.

• It moves downward to make a landing.

• The wheels spin as it moves on the ground.

When a pendulum swings, at which point is kinetic energy highest?

• 1
• 2
• 3
• 4

I am holding a balloon that is full of air, the balloon has

• kinetic energy

• potential energy