Forces and Motion Review

This diagram shows a ball rolling down a ramp. The position of the ball is labeled for each second it travels. Which best describes the position of the ball?

• getting faster each second

• getting slower each second

• maintaining the same motion

• constantly changing direction

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NGSS.MS-PS2-4

A dog runs 6 meters in one second. By the end of the next second, the dog has traveled an additional 4 meters. Which best describes the motion of the dog during the two seconds?

• The dog slows down

• The dog comes to a stop

• The dog changes in mass

• The dog changes direction

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NGSS.MS-PS3-5

Which best describes how forces must interact for a kite to sail up into the air?

• The force of gravity must be equal to the force of the wind.

• The force of gravity must be greater than the force of the wind.

• The force of the wind must be greater than the force of gravity.

• The force of the person flying the kite must be equal to the force of the wind.

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NGSS.MS-PS2-5

What is the most likely reason cars are designed with smooth surfaces?

• to overcome gravity

• to stop easier

• to reduce air resistance

• to keep the engine cool

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NGSS.MS-ETS1-2

This graph shows the motion of an animal. When does the animal remain still?

• between second 1 and 2

• between second 2 and 3

• between second 3 and 4

• between second 4 and 5

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Newton’s First Law says that:

• an object at rest will start moving automatically

• an object at rest will stay at rest unless an outside force acts on it

• an object in motion will never stop moving no matter what

• an object is always at rest and in motion at the same time

Newton’s Second Law says that:

• Acceleration is the same as velocity

• You cannot tell how hard an object will hit

• You can tell how hard an object is going to hit by knowing how big it is and how fast it is speeding up

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NGSS.MS-PS2-2

Which statement best describes what must happen in order for a person to lift an object?

• The force of gravity must be greater than the mass of the object.

• The mass of the object must be greater than the force of gravity.

• The force of gravity must be greater than the upward pull or push on the object.

• The upward pull or push on the object must be greater than the force of gravity.

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NGSS.MS-PS2-4

The diagram shows a ramp with a toy car at the bottom. A string is attached to the front of the car and the string goes over a pulley at the top of the ramp. A weight is attached to the other end of the string. What would be most responsible for the toy car being pulled up the ramp?

• friction

• gravity

• kinetic energy

• momentum

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

What increases as a rock falls to the ground?

• the density of the rock

• the pull of gravity on the rock

• the inertia of the rock

• the momentum of the rock

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