Newton's Law of Motion (8.6 C)

According to Newton's Third Law of Motion, what determines the type of reaction that will take place in response to an action?

• the acceleration in the action

• the mass of the object

• the size and direction of the force exerted on the object

• the inertia of an object

When calculating Newton's Second Law of Motion, what is the resulting unit of measurement called?

• newton

• velocity

• speed

• motion

What three factors are used to express Newton's Second Law of Motion?

• speed, distance, and time

• acceleration, velocity, and speed

• force, mass, and acceleration

• force, velocity, and acceleration

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NGSS.MS-PS2-2

An object that is slowing down is being acted on

• by a net force in the direction of its motion.

• forces that are balanced

• by at least three forces.

• by a net force in the direction opposite of motion.

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NGSS.MS-PS2-2

According to Newton's Second Law of Motion, a force of 500 N can cause a 10-kg object to accelerate at a rate of 50 m/s². What will happen if the mass of the object is doubled?

• The acceleration will be doubled.

• The acceleration will remain unchanged.

• The acceleration will be cut in half.

• The object will move at a greater speed.

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NGSS.MS-PS2-2

A bicycle traveling at a speed of 5 m/s slows down to 2 m/s over the span of 6 seconds. What is the deceleration of the bicycle?

• 0.5 m/s²

• −0.5 m/s²

• 2 m/s²

• −2 m/s²

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NGSS.MS-PS2-2

If an object at rest is being acted on by forces that are balanced, what will happen as a result?

• It will fall to the floor.

• It will begin moving in a circle.

• It will begin moving at a constant speed.

• It will stay at rest.

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NGSS.MS-PS2-2

The reference point in this description of motion is

• the top of the hill.

• the total time the ball rolled.

• the total distance the ball rolled.

• the bottom of the hill.

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NGSS.MS-PS2-4

NGSS.MS-PS3-1

Is a book sitting on a table an example of Newton's Third Law of Motion? Explain.

• Yes, because objects at rest tend to stay at rest

• Yes, because the action is the downward pull of gravity on the book, and the reaction is the upward push of the table, which holds the book in place.

• No. This is not an example of Newton's Third Law of Motion.

• Yes, because F = ma.

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NGSS.MS-PS2-4

Safety restraints are needed in vehicles to stop the forward motion of the driver and passengers when the vehicle comes to a sudden stop. What explains this?

• Acceleration

• Gravity

• Inertia

• Magnetism

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NGSS.MS-PS2-2