Exploring Forces and Motion Quiz

Which of the following is an example of a contact force?

• Gravity

• Friction

• Magnetism

• Light

What is the main function of a lever as a simple machine?

• To change the direction of a force

• To store energy

• To create electricity

• To measure time

Which type of force pulls objects toward the center of the Earth?

• Magnetic force

• Gravitational force

• Frictional force

• Electric force

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Which simple machine is used in a flagpole to raise and lower a flag?

• Wedge

• Pulley

• Screw

• Wheel and axle

If you slide a book across a table, which force slows it down and eventually stops it?

• Gravity

• Friction

• Magnetism

• Tension

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A child uses a ramp to roll a toy car down to the ground. Which simple machine is the ramp an example of?

• Lever

• Pulley

• Inclined plane

• Screw

A student pushes a box across a rough floor and then across a smooth floor. On which surface will the box move farther with the same push, and why?

• Rough floor, because it has more friction

• Smooth floor, because it has less friction

• Both surfaces, because friction is the same

• Rough floor, because it has less friction

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If you use a longer lever to lift a heavy object, how does it affect the effort needed compared to a shorter lever?

• You need more effort with a longer lever

• You need less effort with a longer lever

• The effort stays the same

• You cannot lift the object with a lever

A ball is dropped from a height. Describe the energy changes that occur as it falls to the ground.

• Kinetic energy changes to potential energy

• Potential energy changes to kinetic energy

• No energy change occurs

• Energy is lost completely

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A person uses a pulley to lift a bucket of water from a well. Explain how the pulley makes the task easier.

• It increases the weight of the bucket

• It changes the direction of the force needed to lift the bucket

• It makes the bucket lighter

• It stops the bucket from moving