What is the initial velocity of a car which is stopped in 10 seconds by applying brakes if the retardation due to brakes is 2.5 m s2?

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Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5m/s2 .

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Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. Retardation due to brakes is 2.5 ms-2.

Let initial velocity be u.Final velocity is v= 0 m/s.Time taken by body to come to rest = 10 sec.

Retardation =2.5 ms-2.

We know v = u +at.Then u = v - at.u = 0 - (-2.5 X 10) = 25 m/s.

So initial velocity of the body is 25 m/s.

Concept: Equations of Motion by Graphical Method

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