Physical Science 11.2

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Multiple Choice

A woman jogs 10 kilometers in one hour, stops at a restaurant for one hour, and then walks 10 kilometers in two hours. What is her average speed for the outing?

• 0.2 km/h

• 4 km/h

• 5 km/h

• 10 km/h

Multiple Choice

Lisa plotted time on the x-axis of a line graph and distance on the y-axis. What does the slope of her graph represent?

• total distance traveled

• velocity

• speed

• displacement

Multiple Choice

Lisa plotted time in seconds on the x-axis of a line graph and distance in centimeters on the y-axis. Her plot showed a straight line from (0,0) to (10, 20). What is the speed?

• 0.5 cm/s

• 2 cm/s

• 10 cm/s

• 20 cm/s

Multiple Choice

Two velocities of an object are combined by using

• division of the larger velocity by the smaller velocity

• addition of the two speeds

• vector addition

• numeric addition

Multiple Choice

A kayak is moving across a stream that is flowing downstream at a velocity of 4 km/h. The kayak’s velocity is 3 km/h. What is the magnitude of the kayak’s velocity relative to the river bank?

• 1.3 km/h

• 5 km/h

• 7 km/h

• 12 km/h

Multiple Choice

The SI unit for speed of an airplane is miles per hour

• true

• false

Multiple Choice

Which graph represents the fastest runner?

• A

• B

• C

• D

Multiple Choice

which equation describes the fastest runner?

• distance=0.5⋅time

• distance=0.33⋅time

• distance=time

• distance=2⋅time

Multiple Choice

Which graph indicates that one of the runners started 10 meters ahead of the other?

• a

• b

• c

• d

Multiple Choice

In which of these graphs are both runners moving at the same speed

• A

• B

• C

• D

Multiple Choice

Which sentence best describes the runner whose distance-time graph is shown?

• The runner ran forward for 2 seconds, and then backward for 2 seconds

• The runner ran forward for 2 seconds, and then stood still for 2 seconds

• The runner ran forward for 2 seconds, and then ran forward more slowly for 2 secondS

• The runner ran forward for 2 seconds, and then turned right and continued forward at the same speed for 2 seconds