11-2 Quiz

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1 point

When velocity changes by the same amount over each time interval, acceleration is

positive.

negative.

zero.

constant.

1 point

What happens when a car slows down and velocity changes?

resultant acceleration

constant acceleration

positive acceleration

negative acceleration

1 point

Speeding up, slowing down, and changing direction is best described as

velocity.

displacement.

distance.

acceleration.

1 point

The equation for finding average acceleration for straight-line motion is

initial velocity – final velocity time.

initial velocity + final velocity – time/.

final velocity – initial velocity / time.

initial velocity + final velocity + time.

1 point

A cyclist is traveling at an initial speed of 10.0 m/s. She accelerates at a rate of 0.500 m/s^2. What is her final speed after 9.0 s?

14.5 m/s

5.5 m/s

14.5 m/s2

5.5 m/s2

1 point

Moving from 0 m/s to 25 m/s in 8.0 s equals an average acceleration of

3.1 m/s^2

3.1 m/s.

0.32 m/s.

0.32 m/s^2

1 point

Peter runs in a constant direction on a straight road. The velocity vs. time graph of Peter’s motion shows a straight line with a negative slope. What does the line tell you about Peter’s speed?

It is decreasing, then increasing.

It is decreasing.

It is constant.

It is increasing.

1 point

When centripetal acceleration occurs, an object

slows down.

changes direction.

is stationary.

speeds up.

1 point

A cheetah can accelerate at up to 6.0 m/s^2. How long does it take for a cheetah to speed up from 10.5 m/s to 12.2 m/s?

10s

3.5s

1.7s

0.28s

10.

1 point

On a velocity vs. time graph, what shows the value of the acceleration?

the slope of the line

the y-axis

the final velocity

the x-axis

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