Speed and Velocity

Question 1

Which statement correctly describes the differences between positive and negative acceleration?

Revolt · Accepted Answer

Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.

Question 2

[___]

Revolt · Accepted Answer

C

Question 3

[___]

Revolt · Accepted Answer

B

Question 4

[___]

Revolt · Accepted Answer

A

Question 5

Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up to 45 m/s. If it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to the nearest whole number.)

Revolt · Accepted Answer

5 m/s2

Question 6

A cyclist going downhill is accelerating at 1.2 m/s2. If the final velocity of the cyclist is 16 m/s after 10 seconds, what is the cyclist’s initial velocity?

Revolt · Accepted Answer

4 m/s

Question 7

The acceleration of segment D is [___] m/s2.

Revolt · Accepted Answer

-4

Question 8

Which graph shows acceleration?

Revolt · Accepted Answer

[Image: A graph of position (meters) versus time (seconds)...]

Question 9

Which statement correctly describes the differences between positive and negative acceleration?

Revolt · Accepted Answer

Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.

Question 10

An airplane traveling 245 m/s east experienced turbulence, so the pilot decided to slow down to 230 m/s. It took the pilot 7 seconds to get down to this speed. What is the acceleration of the plane? (Round your answer to the nearest integer.)

Revolt · Accepted Answer

–2 m/s2

Speed and Velocity Answers

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