Question

a car was moving with a uniform velocity .when its brake was applied it stopped in 5 second with retardation 1m/s2.calculate its initial velocity

Answer 1

Explanation:

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Answer 2

Answer:

5m/s is it .

Explanation:

Let us take time t=o when brakes are applied.

Let u=velocity at t=0 and v=velocity at t=t.

Also,let a=acceleration .

Here t=5s, v=0m/s,a=-1m/s^2.

ASSUMING that car continues to move on the straight path,we have the following equation of rectilinear motion with uniform acceleration:

v=u+at then,0=u-1(m/s)5(m/s).

Therefore,u=5m/s. Ans.

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