Question

A driver decreases the speed of car from 20m/s to 5 m/s in
5 seconds. Find retardation.
plzz give me answer​

Answer 1

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$\rule{200}3$

Initial velocity (u) = 20m/s

Final velocity (v) = 5 m/s

Time (t) = 5 seconds

Retardation = v - u / t

= (5 - 20)m/s / 5s

= -15 / 5

= -3 ms^2

$\rule{200}3$

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