5.P.1.1 #6: Schoolnet

Which best describes how Larry can increase the speed of his race car?

• by decreasing the mass of the car

• by increasing the mass of the car

• by increasing the force of friction

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NGSS.MS-PS2-2

Pam ran down the sidewalk to school with her empty backpack. After

school Pam’s backpack was loaded with books. Which best describes the

force required to carry her book bag home?

• It took the same amount of force to carry the loaded book bag

  home.

• It took a greater amount of force to carry the loaded book bag home.

• It took a lesser amount of force to carry the loaded book bag home.

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NGSS.MS-PS2-2

When added to a smooth road surface, which would create the greatest

amount of friction for a car?

• ice

• rain

• sand

Which surface will most likely cause a rolling ball to slow down?

• grass

• ice

• tile

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NGSS.MS-PS2-2

Which best explains why a ball increases in speed as it rolls down a

hill?

• The ball increases in speed because of friction.

• The ball increases in speed because of gravity.

• The ball increases in speed because the mass changes.

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NGSS.MS-PS2-2

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Which is the force that pulls a ball to the ground after being dropped?

• friction

• gravity

• air resistance

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NGSS.MS-PS2-4

Matt had a toy truck weighing 15 grams and a toy car weighing 6 grams.

Using the same amount of force on each toy, he pushed them both

across his desk. The car reached the other side of the desk in 1.5

seconds, but it took the truck 3.5 seconds to reach the the other side of

the desk. Why did the car travel the same distance in a shorter amount

of time?

• The car had less mass and traveled at a faster speed than the truck.

• The car had more mass and traveled at a faster speed than the truck.

• The truck had more mass and traveled at a faster speed than the car.

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NGSS.MS-PS2-2

A man is pushing a ball up a hill. If the man stops pushing the ball and

steps out of the way, what will most likely happen to the ball?

• It will stop on the hill.

• It will roll down the hill.

• It will roll to the side toward the man.

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When two objects are dropped from the same height, they will land at

the same time. Which best explains why this happens?

• mass

• friction

• gravity

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NGSS.MS-PS2-4

Which best describes the force of gravity?

• a pulling force

• a pushing force

• a change in mass

• a change in speed

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