Question

3.
How long will it take to stop a car travelling at
a speed of 30 m/s. If the uniform acceleration
during braking is - 6 m/s2
(1)
s
(2) Tos
(3)
10 s
(975s
​

Answer 1

When the car is at rest, its velocity is 0. So, the final velocity should be 0 in this case.

Using 1st equation of motion :

=> v = u + at

=> 0 = 30 + (-6)t

=> t = 5 seconds

Hope it'll help you.....