Forces in Motion/Newtons Laws REview

1. A copper coin resting on a piece of cardboard is placed on a beaker as shown in the diagram. When the cardboard is rapidly removed, the coin drops into the beaker. The two properties of the coin which best explain its fall are its weight and its

• inertia

• electrical resistance

• volume

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This force is caused by air and slows things down.

• friction

• air resistance

• pulling

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A rocket launches because of ______.

• gravity

• air resistance

• an opposite reaction

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An object's motion won't change unless acted on by a(n) _________

• motion

• unbalanced force

• balanced force

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A baseball pitcher throws a baseball. It does not reach the catcher. What should the pitcher do to make a ball reach the catcher?

• Decrease the force used when throwing the ball

• Increase the force used when throwing the ball

• Increase the gravity exerted on the ball

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An object in motion stays in motion and an object at rest stays at rest.... is what law?

• Newton's 1st Law (Inertia)

• Newton's 2nd Law

• Newton's 3rd Law

If a car is moving fast and hits a wall, the wall will....

• apply an equal and opposite force back on the car

• allow the car to run through the wall

• open up and swallow the car

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Why does a person continue to fly forward in a car after a crash?

• the person is not moving until the car stops

• the person is still in motion

• the person jumps out of the car

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Jupiter has about 317 times more mass than Earth. What can you infer from this fact?

• That Jupiter’s and Earth’s gravitational forces are equal.

• That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.

• Mass has no effect on the gravitational force between two objects

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How can you increase the acceleration of an object?

• decrease its mass

• increase its friction

• decrease the force applied to it

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