A car drives at a constant speed of 21 m/s around a circle of radius 100 m. What is the centripetal acceleration of the car? O A

Question

A car drives at a constant speed of 21 m/s around a circle of radius 100 m.
What is the centripetal acceleration of the car?
O A. 4.8 m/s2
O B. 0.21 m/s2
O C. 3.1 m/s2
O D. 4.4 m/s2

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Ben Gia 4 years 2021-08-12T22:56:13+00:00 1 Answers 47 views 0

Answers ( )

  1. hongcuc2
    0
    2021-08-12T22:57:37+00:00
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    Answer:

    Option D. 4.4 m/s²

    Explanation:

    The following data were obtained from the question:

    Velocity (v) = 21 m/s

    Radius (r) = 100 m

    Centripetal acceleration (a) =.?

    The centripetal acceleration of the car can be obtained as follow:

    Centripetal acceleration (a) = Velocity square (v²) / radius (r)

    a = v²/r

    a = 21²/100

    a = 441/100

    a = 4.41 ≈ 4.4 m/s²

    Therefore, the centripetal acceleration of the car is 4.4 m/s².

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