Contact Forces quiz

What is potential energy?

• Energy of motion.

• Stored energy caused by an object's position.

• Energy stored in chemical bonds.

• Energy that is stored in the nucleus of an atom.

How much do you have to push on any object to get it to deform?

• You have to push very hard to deform any object.

• Objects don't deform when you push on them.

• Objects deform easily with a small amount of force.

• The amount of force required to deform an object depends on its material and shape.

How does changing the mass or speed of an object affect the forces on those objects during a collision?

• Changing mass or speed has no effect on the forces during a collision.

• Increasing mass or speed decreases the forces during a collision.

• Decreasing mass or speed can increase the forces during a collision.

• Increasing mass or speed increases the forces during a collision.

Define kinetic energy.

• Energy of motion.

• Energy an object has due to its position.

• Energy that comes from chemical bonds.

• Energy that is stored in the nucleus of an atom.

Given a zipline, how does the energy change from the top of the zipline to the bottom?

• Potential energy starts at 50%, and stays at 50% until the end.

• Potential energy starts at 100%, and drops to 50% at the bottom.

• Kinetic energy starts at 100% at the top, and drops to 0% at the bottom.

• As kinetic energy increases down the line, potential energy decreases.

Consider the pendulum to the left. What will the energy percentages be at position 2?

• Kinetic = 100%

  Potential = 100%

• Kinetic = 50%

  Potential = 50%

• Kinetic = 0 %

  Potential = 100%

• Kinetic = 100%

  Potential = 0%

If you were to throw a baseball straight up into the air, how would the energy change?

• The energy of the baseball would decrease as it goes higher.

• The energy of the baseball would increase as it goes higher.

• The energy of the baseball would remain constant.

• The energy of the baseball would change, but the direction of motion affects the type of energy (kinetic or potential).

How would gravity cause changes in its potential energy?

• Gravity does not affect an object's potential energy.

• Gravity increases an object's potential energy as it moves higher above the ground.

• Gravity decreases an object's potential energy as it moves higher above the ground.

• Gravity only affects an object's kinetic energy, not its potential energy.

How would gravity cause changes in its kinetic energy?

• Gravity does not affect an object's kinetic energy.

• Gravity increases an object's kinetic energy as it moves higher above the ground.

• Gravity decreases an object's kinetic energy as it moves higher above the ground.

• Gravity increases an object's kinetic energy as it moves closer to the ground.

During a football game, one player crashes into another player. How does energy transfer during the collision?

• Energy is created during the collision.

• Energy is lost during the collision.

• Energy is transferred from one player to the other player.

• Energy remains constant and does not change during the collision.