Forces of Motion Review

A car traveled 100 miles north through a forest for 2 hours. Then the car traveled 50 miles west through a desert for 1 hour. Which statement best describes the motion of the car as it traveled through the forest and the desert?

• The car’s average speed changed, but its direction of motion remained the same.

• The car’s direction of motion changed, but its average speed remained the same.

• The car’s average speed and direction of motion both remained the same.

• The car’s average speed and direction of motion both changed.

Janice looks out of the passenger window of the car as her mother drives. The guardrail posts are spaced 20 meters apart. Janice notices the time it takes to pass each guardrail post increases over time. Which choice explains her observation?

• The car is speeding up.

• The car is slowing down.

• The car is moving in reverse.

• The car is moving at a constant speed.

Tags

NGSS.MS-PS3-4

Jeff rides a bicycle north on a sidewalk. Jeff passes a skateboarder who is also heading north. What must be true regarding the motion of the Jeff?

• Jeff is traveling at the same speed as the skateboarder.

• Jeff is traveling at a faster speed than the skateboarder.

• Jeff is traveling at a slower speed than the skateboarder.

• Jeff is traveling in a different direction from the skateboarder.

Piero ran 300 meters in 20 seconds. Nayshaun ran 100 meters in 10 seconds. Which statement correctly represents Piero’s and Nayshaun’s speeds? (speed = distance ÷ time)

• They both ran at a speed of 0.5 meter per second.

• They both ran at a speed of 5 meters per second.

• Piero ran faster than Nayshaun.

• Nayshaun ran faster than Piero.

A ball rolls on a grassy playing field. The ball experiences friction as it rolls. How will friction affect the ball’s motion?

• The ball experiences an unbalanced force and will slow down.

• The ball experiences an unbalanced force and will speed up.

• The ball experiences balanced forces and will slow down.

• The ball experiences balanced forces and will speed up.

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NGSS.MS-PS2-2

Two forces are applied to a large box. One force is pushing it to the right and another smaller force is also pushing it to the right. Which is true about the box′s movement?

• It is not moving.

• It is slowing down.

• It is accelerating to the right.

• It is moving at a constant speed to the left.

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NGSS.MS-PS2-2

Which is a period of time in which the runner ran with an average speed of 2 miles per hour?

• between 0 and 1 hours

• between 1 and 2 hours

• between 2 and 3 hours

• between 3 and 4 hours

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NGSS.MS-PS3-1

When is the bus traveling the fastest?

• between hours 0 and 1

• between hours 4 and 5

• between hours 5 and 6

• between hours 6 and 7

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NGSS.MS-PS3-1

How far did the bus traveled in 8 hours if it maintains a constant speed?

• 350 miles

• 400 miles

• 450 miles

• 500 miles

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NGSS.MS-PS3-1

What time were the two objects traveling at same speed?

• 5 s

• 10s

• 15s

• 20s

Tags

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