Question

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

Answer 1

Explanation:

2.5= (final velocity-intial velocity)/time

according to brakes ,final velocity is zero.

intial velocity=2.5×10=25m/s

Answer 2

Answer:

25 m/s

Explanation:

v=u+at

Here, v=0, a= -2.5, t=10

v-at=u

0-(-2.5)(10)=u

u=25m/s