Forces & Motion Unit Review

A student uses a bat to hit a softball with a certain force. Then she hits a heavier ball with the same force. How does the heavier ball move compared with the lighter softball?

• faster and farther
• faster and not as far
• more slowly and farther
• more slowly and not as far

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What best affects the motion of an object?

• color of the object
• strength of the force applied
• volume of sound
• water vapor in the air

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Nick and Mike are facing each other on skateboards. They touch palms and push off from each other. Which best describes their movement?

• Neither Nick nor Mike will move.
• Nick and Mike will move backward away from each other.
• Nick will move forward, and Mike will move backward in the same direction.
• Nick will move backward, and Mike will move forward in the same direction.

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When two equal and opposite forces are at work, what happens to motion?

• It increases
• It decreases
• There is no motion
• There is maximum friction

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What is gravity?

• the amount of matter that makes up an object
• a measure of how far an object moves in a certain amount of time
• a force the pulls things toward each other
• a force that pushes things away from each other

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How does the distance between objects affect the force of gravity between them?

• The greater the distance, the greater the force of gravity
• The smaller the distance, the greater the force of gravity
• The smaller the distance, the smaller the force of gravity
• Distance has no effect on the force of gravity

What causes an object to fall to the ground?

• air resistance
• time
• gravity
• friction

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Michael is using the balls pictured for an experiment.  He kicks the two balls with the same amount of force and thinks the heavier ball will go farther.  Is he correct?

• No.  he is incorrect because the lighter ball has less mass, so it is affected by more gravity.
• Yes, he is correct because the heavier ball has more mass, so it is affected by less friction.
• No, he is incorrect because the lighter ball has less mass, so it will travel farther.
• Yes, he is correct because the heavier ball has more mass, so it will move farther.

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Team A is on the Left and Team B is on the right.  Which team will win the Tug of War?

• Team A
• Team B
• Neither

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Shane and Brett push a toy car on a straight track. When Shane pushes the car, it goes a longer distance than when Brett pushes it. Which best explains this?

• Brett applied more force to the car.
• Shane applied more force to the car.
• Brett did not apply any force to the car.
• Shane applied the same amount of force as Brett.

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