Newton's Laws

According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• accelerate.

A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

• For every action there is an equal and opposite reaction.
• Every mass exerts a force on every other mass.
• An object at rest tends to stay at rest.
• Friction opposes the motion of an object.

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What is Newton's 1st Law?

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

• An object at rest will stay at rest, an object in motion will stay in motion, unless an unbalanced force acts upon it.

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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

Newton's Second Law is based on two variables, they are .....

• mass and the amount of force

• gravity and friction

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NGSS.MS-PS2-2

Force = Mass x Acceleration

• 1st Law

• 2nd Law

• 3rd Law

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NGSS.MS-PS2-2

Two bumper cars collide into each other and each car jolts backwards.

• 1st Law

• 2nd Law

• 3rd Law

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NGSS.MS-PS2-1

When you give your friend a lift on your bike you must pedal harder and faster to keep the same speed (and acceleration) as you had before when you were on your bike alone.

• 1st Law

• 2nd Law

• 3rd Law

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NGSS.MS-PS2-1

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