Question

Find the initial velocity of a car which is stopped in 10 seconds by applying brakes the retardation due to breaks is 2.5m/s^2

Answer 1

Initial velocity = retardation speed * time

= 2.5 * 10
=25m/s

Answer 2

Step-by-step explanation:

Answer⤵️

Initial velocity, u=?

Final velocity, v=0m/s (car is stopped)

Acceleration, a=−2.5m/s²(negative because it is retardation)

Time, t=10s

Use the relation of the first equation of motion:

v=u+at

0=u+(−2.5)×10

u=25m/s

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