Question

a car is retarted by appling brakes at the rate of 2 m/s^2. it is finally stopped in 10 seconds. find its initial velocity

Answer 1

A=2m/s2
T=10 secs
V=0m/s

V=u +at
0=u + (-2x10)
U = 10m/s

Answer 2

Deceleration = - 2 m/s²

Time = 10 sec

Final velocity ( v ) = 0 m/s

v = u + at

0 = u + ( -2) × 10

0 = u - 20

u = 20 m/s