Question

F & O-VII 2. MOTION & TIME
28. The brakes applied to a car produce a negative acceleration of 6ms-? If the car stops after
2 seconds, the initial velocity of the car is :
6 me-1
(BY 12 ms-1
(C) 24 ms-1
(D) Zero​

Answer 1

Given:-

a = -6 m/s²

t = 2 s

v = 0

To find:-

u

Formula-

v = u +at

Solution:-

0 = u + -6×2

0 = u - 12

u = 12 m/s

Hence, the intial velocity is 12 m/s

option b