Newton's Laws

A push or a pull is called a

• Gravity

• Force

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is Newton's 2nd Law?

• For every action there is an equal and opposite reaction.

• Acceleration depends on two variables, the mass of the object and the amount of force.

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What is Newton's 3rd Law?

• For every action there is an equal and opposite reaction.

• Acceleration depends on two variables, the mass of the object and the amount of force.

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What explains why objects resist changes in their state of motion?

• gravity

• inertia

• force

• friction

Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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NGSS.MS-PS2-2

The girl on the sled will remain in motion unless

• her motion is changed by magnetic forces.

• she is stopped by an outside force.

• she accelerates at a constant speed.

• the force of friction forcer her to move faster.

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"A body at rest tends to remain at rest, and a body in motion, tends to remain in motion, unless acted upon by an unbalanced force."

This is describing the law of

• forces

• inertia

• velocity

• gravity

An inflated balloon released from rest moves horizontally.

The law that best explains this event is

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Law of Gravity

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NGSS.MS-PS2-1

A dictionary weighing 15 Newtons is placed on a desk.

What is the force that the desk exerts on the dictionary?

• none

• 15 N

• 1.5 N

• 150 N

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