Newton's Laws Intro

Which of the following is an example of balancing forces?

• A Book resting on the table.

• A pencil is knocked off the desk.

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NGSS.3-PS2-1

Which of the following is an example of an unbalanced force?

• A book resting on the table.

• A pencil that is knocked to the ground.

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NGSS.MS-PS2-2

A push or a pull is called a

• Gravity

• Force

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NGSS.3-PS2-1

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

• gravity

• inertia

• force

• friction

What explains a quantity that has BOTH speed and direction?

• Inertia

• Force

• Speed

• Velocity

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

Which way would a swimmer push to move forward in the water?

• To the left

• Forward

• Backward

• To the right

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NGSS.3-PS2-1

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

• Unbalanced

• Balanced

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NGSS.3-PS2-1

If an object is accelerating, then the forces actin on it must be:

• Balanced

• Unbalanced

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NGSS.MS-PS2-2

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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NGSS.MS-PS2-1