Question

a man applies the break and bring his car to rest in 1.5 sec if the retardation of the break is 5meter/sec2 find the initial velocity of the car​

Answer 1

Answer:

v = u + at

Since the body comes to rest, final velocity v = 0

Acceleration = -5

t = 1.5s

Substituting in equation

0 = u - 5 × 1.5

u = 7.5 m/s

Answer 2

Answer:

7.5

Explanation:

final velocity is zero. v=0

and from v=u-at

u=at

u=5*1.5

therefore initial velocity u=7.5m/s