Forces and Motion Benchmark Review

What happens when an elevator is moves from the second floor to the sixth floor?

• The elevator is being helped by the force of gravity since gravity is pulling the elevator up.

• The elevator is overcoming the force of gravity.

• The elevator is moving at a constant speed because of high friction.

• The elevator is moving easily because of increased low friction.

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The amount of force required to change the motion of an object depends on which factor?

• the mass of an object

• the location of the object

• the color of the object

• the owner of the object

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How does mass affect the motion of an object?

• The shorter the object, the more force it will take to move it.

• The taller the object, the more force it will take to move it.

• The smaller the mass, the more force it will take to move it.

• The larger the mass, the more force it will take to move it.

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A ball is rolled across a carpet. Then the ball is rolled on a smooth surface. Which explains why the ball rolls slower on the surface covered by carpet than on the smooth surface?

• There is more gravity between the ball and the carpet.

• There is no friction between the ball and the carpet.

• There is more friction between the ball and the carpet.

• There is less gravity between the ball and the carpet.

A force of the same strength is applied to two boxes. One box is 10 pounds and the other box is 20 pounds.

Which describes the motion of the boxes?

• The larger box will move faster than the smaller box.

• The boxes will move at the same speed.

• The smaller box will move faster.

• The boxes won't move at all.

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Mike is pushing a box with twenty books in it. He adds ten more books to the box. If he continues pushing with the same force, what effect will the extra books have on the motion of the box?

• The box will move faster due to more mass.

• The box will move more slowly due to more mass.

• The box won't move at all.

• The box will move faster due high friction.

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Barb and Trey are pushing a box toward one another with equal force. What would happen if Trey stopped pushing?

• The box would move towards Barb

• The box would not move.

• The box would move towards Trey.

• The box would move upwards towards the sky.

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A bus traveled 150 miles in 5 hours on Wednesday and 120 miles in 3 hours on Thursday. Which best describes the speed of the truck? (speed = distance ÷ time)

• The bus's speed was 60 miles per hour on Wednesday

• The bus's speed was 20 miles per hour on Wednesday.

• The bus's speed was 10 miles more per hour on Wednesday.

• The bus's speed was 10 miles less per hour on Wednesday.

What may cause an object that is moving in a straight line to change direction?

• an increase in mass

• an outside force

• an increase in speed

• deceleration

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A man hiked 10 miles in one hour. By the end of the second hour, he had hiked a total of 8 miles. What describes the motion of the man during the second hour?

• His speed decelerated in the second hour.

• His speed accelerated in the second hour.

• His speed remained constant.

• The man stopped to eat an ice cream cone, and it was delicious.