Review of Newton's Law of Motion

Newton’s first law of motion states that a moving object, unless it is acted on by an unbalanced force, will

• eventually come to a stop

• remain in motion

• accelerate.

A student measures two blocks with different masses with spring scales, as shown. Which claim comparing the blocks is correct?

• Because block 2 has a smaller mass than block 1, block 2 will require less force to accelerate.

• Because block 1 has a smaller mass than block 2, block 1 will require less force to accelerate

• Because block 2 has a smaller mass than block 1, block 2 will require greater force to accelerate

• Because block 1 has a smaller mass than block 2, block 1 will require greater force to accelerate.

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NGSS.MS-PS2-2

An aircraft carrier runway is only about 300 feet in length. This is much shorter than a normal runway, which is usually 2,300 feet. Which statement most likely describes how airplanes landing on aircraft carriers adjust to landing on such a short runway?

• Airplanes use less force to stop quickly on the short runway

• Airplanes use more force to stop quickly on the short runway

• Airplanes are heavier so they have more friction and can stop quickly

• Airplanes are lighter so they have less gravity and can stop quickly

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NGSS.MS-PS2-2

Which of the following vehicles is acted on by balanced forces?

• A bicycle speeds up as it is traveling down a hill

• A car is traveling at a constant speed around a bend.

• A truck driver applies the brakes to slow down his truck

• A train is stopped at a station waiting to pick up passengers

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NGSS.MS-PS2-2

Which of the following is an example of unbalanced forces?

• a car moving with constant speed on a straight road

• a hanger hanging on a rod

• a ball thrown up that comes back down

• a parked bus

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NGSS.MS-PS2-2

Katherine folds a paper airplane and attaches a paper clip to the front of it. After she throws the plane, it travels about 30 feet and then starts to fall to the ground. Why does the plane eventually fall to the ground?

• The molecular force of the ground begins acting on the plane

• The force of air resistance stops acting on the plane

• The paper clip creates a magnetic force that attracts the plane to the ground

• The force of gravity is greater than the forces keeping the plane in the air

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Sean held a ball in the air. Which force was he acting against to keep the ball in the air?

• inertia

• friction

• gravity

• heat

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What will happen to the movement of the box when 10 N of force is added on the right?

• The box will move upward

• The box will move to the left.

• The box will move downward

• The box will move to the right

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NGSS.MS-PS2-2

A push or pull exerted on an object in order to change the motion of the object, force has size and direction

• Centripetal Acceleration

• Force

• Net Force

• Inertia

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NGSS.MS-PS2-2

Newton's first law of motion states that an object at rest will remain at rest or an object in motion will remain in a constant motion, unless acted on by an outside force. Another name for this law is the

• law of acceleration

• law of gravity

• law of inertia

• aw of momentum