Question

A car is moving with a velocity 20 m/s. The brakes are applied to retarded it at a rate of 2 m/ s^2. What will be the velocity after 5 seconds after the applying of the brake
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Answer 1

Explanation:

REFER TO MINE ATTACHMENT.......

Answer 2

u = 20m/s

v = ?

a = -2m/s² (-ve sign indicates that it is retardation)

t = 5s

v = u + at

v = 20 - 2×5

v = 20 - 10

v = 10m/s

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