Question

A car is retarted by applying brakes at the rate of 2 ms. It is finally stopped in 10 sec . Find its initial velocity​

Answer 1

Answer:

20m/s

Explanation:

a=-2m/s2

t=10 sec

v=0m/s

u=?

v=u+at

0=u+(-2)X10

-u=-20

u=20m/s

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Answer 2

Given that final velocity should be zero

Retardation is of - 2 metre per second square

Initial velocity be u

Final velocity v

We know that v= u + a