A car is traveling at 20 meters/second and is brought to rest by applying brakes over a period of 4 seconds. What is its average acceleration over this time interval?

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asked Jan 22, 2018 143k views

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A car is traveling at 20 meters/second and is brought to rest by applying brakes over a period of 4 seconds. What is its average acceleration over this time interval?

Physics
high-school

Jermel asked

by Jermel

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2 Answers

1 vote

The answer is -5 m/s^2. or -5 meter per second

Barbiepylon answered Jan 24, 2018

by Barbiepylon

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2 votes

(u) = 20 m/s
(v) = 0 m/s
(t) = 4 s

0 = 20 + a(4)

4 x a = -20

so, the answer is -5 m/s^2. or -5 meter per second

Ekhanna answered Jan 27, 2018

by Ekhanna

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