Understanding Forces and Energy

What force causes the boy to slow down?

• Gravity

• Friction

• Magnetism

• Kinetic energy

If there were no friction, what would happen to the bicycle?

• It would stop immediately.

• It would roll forever.

• It would bounce back up the hill.

• It would float in the air.

What kind of energy does the bicycle have while moving?

• Potential energy

• Kinetic energy

• Chemical energy

• Electrical energy

What force helped the boy speed up while going downhill?

• Magnetism

• Gravity

• Inertia

• Electricity

What type of energy did the ball have before being dropped?

• Kinetic energy

• Potential energy

• Electrical energy

• Chemical energy

What happened to the ball when it hit the ground?

• It gained friction.

• It absorbed heat energy.

• It bounced back due to kinetic energy.

• It stopped moving completely.

What would happen if the ball were dropped in space where there is no gravity?

• It would bounce higher.

• It would stay in place.

• It would fall faster.

• It would turn into light energy.

Why did the ball bounce higher when dropped from a greater height?

• It had more friction.

• It had more potential energy.

• It had more magnetism.

• It had more sound energy.

Which force is acting against the rocket’s movement?

• Friction

• Gravity

• Magnetism

• Electricity

What force makes the rocket move upward?

• Inertia

• Reaction force

• Weightless energy

• Sound energy