Forces and Energy Review

What is the force that slows down or eventually stops an objects motion?

• Gravity

• Push

• Motion

• Friction

Which experiment listed below will best determine how friction affects the speed of a rolling object?

• Roll 3 objects of various sizes across the floor.

• Roll 3 objects of equal size from various heights across the floor.

• Roll 3 objects of equal size across 3 different types of surfaces.

• Roll 3 objects of equal size from equal heights across the floor.

Tags

NGSS.MS-PS3-1

A polar bear slides down an ice covered hill. As he slides, he slows down. Eventually he comes to a stop. What force acts on an object to slow or stop its motion?

• Speed

• Friction

• Gravity

• Direction

Tags

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A student drops a ball from shoulder height. The ball bounces 5 times before coming to a stop. What force causes the ball to fall to the ground?

• Friction

• Magnetism

• Position

• Gravity

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Looking at the picture, what two tools would be needed to measure the effect of friction on the ball?

• Hand lens and balance

• Balance and spring scale

• Measuring tape and stop watch

• Spring scale and hand lens

Students wrap a copper wire around an iron nail and connect the ends of the wire to the battery. The nail attracts other small nails and paper clips as they stick together. What force is being observed?

• The students are observing the force of gravity.

• The students are observing the force of friction.

• The students are observing the force of magnetism.

• The students are observing the force of electricity.

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A boy applies a pushing force on a ball thrown into the air. What applies a pulling force on the ball at the same time?

• Gravity

• The height of the boy

• Friction

• The mass of the ball

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A ball rolled on a carpet will not travel as far as a ball rolled on ice because of the ______________ slowing the ball on the carpet down.

• gravity

• friction

• force

• motion

A person running down a basketball court would be an example of ___________?

• Gravity

• Magnetism

• Kinetic Energy

• Potential Energy

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Which is kinetic energy?

• energy that is stored in the position, or structure, of an object

• energy that is increasing

• energy that is decreasing

• the energy of a moving object

Tags

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