Question

car driving on a circular test track shows a constant speedometer reading of 100 kph for one lap. a. Describe the car's speed during this time. b. Describe its velocity. c. How do the speed and velocity compare?

Answer 1

Answer:

A) Speed is constant = 200 km/h 

B) Velocity is variable or "constantly changing" due to the constant change of direction. 

Note: Velocity is NOT zero. Displacement is zero after each lap, not velocity. 

Explanation:

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Answer 2

THE SPEED OF THE CAR

In this question, it has been said that a person drives a car on a circular track with a constant speed of 100kmph for one lap. Also, it can be seen through the question the car keeps on rotating on the same track the speed will remain constant, and as the track is round the initial and the end point of the journey would be the same, therefore, the displacement of the car would be zero. Therefore, the following conclusions can be drawn:

• The speed of the car moving around the track would be 100kph.
• The velocity of the car moving around the track will completely keep on changing.
• The displacement of the car would be zero as it is a round track.

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