Physics Review Unit 2

Scott travels north 5 miles and then goes west 3 miles before coming straight back south 2 miles. What is his DISTANCE?

• 10 mi

• 7 mi

• 8 mi

• 6 mi

What is the rate of acceleration of the object between 0 and 4 seconds?

• 1 m/s

• 0 m/s²

• -1 m/s²

• 1 m/s²

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A ball rolls off a table 1.5 m high and falls to the ground. Which statement correctly describes its motion as it falls to the ground?

• Its horizontal and its vertical speed increase.

• Its horizontal and its vertical speed do not change.

• Its horizontal speed increases but its vertical speed does not change.

• Its horizontal speed does not change but its vertical speed increases.

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When does the object have the greatest speed?

• 0 to 4 s

• 4 to 6 s

• 6 to 9 s

• All of these

A  car starts from rest and after  7 seconds it is moving at 42  m/s. What is the car’s acceleration?

• 0.17
• 1.67
• 6
• 7

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A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? 

• 4.20 m
• 52.5 m
• 105 m
• 158 m

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The SI unit for length or distance is

• foot (ft)
• inch (in)
• mile (mi)
• meter (m)

In each of the following cases, determine which car has the greatest acceleration.

• starts from 0 m/s to 20 m/s in 4 seconds.
• speed up from 20m/s to 40m/s in 3 seconds
• slow down from 50m/s to stop in 2 seconds
• starts from 0 m/s to 20m/s in 5 seconds

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A quantity that is has magnitude and  direction is referred to as a

• vector quantity
• scalar quantity

An object can be moving for 10 seconds and still have zero displacement.

• True
• False