Speed and Velocity

Question 1

Which scenario involves acceleration?

Revolt · Accepted Answer

a car decreasing its speed due to a red light

Question 2

What did you include in your response? Check all that apply.

Revolt · Accepted Answer

Acceleration can be described as a change in speed, direction, or both.; The merry-go-round does not change its speed, but it changes its direction as it moves.

Question 3

A merry-go-round moves in a circle at a constant speed. Is the merry-go-round accelerating? Explain your answer.

Revolt · Accepted Answer

Yes, the merrygoround is accelerating. Although the speed remains constant, acceleration is defined as a change in velocity, which includes both speed and direction. Since the merrygoround moves in a circle, its direction is constantly changing, meaning it is accelerating.

Question 4

Study the image of the roller coaster, then answer the questions. Note that the arrows indicate the direction of the movement of the roller coaster train. Which section (A or B) of the roller coaster shows positive acceleration? Which section (A or B) of the roller coaster shows negative acceleration?

Revolt · Accepted Answer

Part 1: A; Part 2: B

Question 5

Question 5

Revolt · Accepted Answer

75620

Question 6

A car traveling at a speed of 24 m/s comes to a stop at a red light.How much time will it take for the car to stop if its acceleration is –8.0 m/s2?

Revolt · Accepted Answer

3 s

Question 7

The graph shows the motion of a car. Which segments show that the car is accelerating? Select three options.

Revolt · Accepted Answer

A; C; E

Question 8

The graph shows the motion of a car. Which segment shows that the car is slowing down?

Revolt · Accepted Answer

C

Question 9

⇒ 5

Revolt · Accepted Answer

75621

Question 10

What is the acceleration of the car at segment C?

Revolt · Accepted Answer

–30 m/s2

Speed and Velocity Answers

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