Question

A car has an initial velocity of 10m/s and comes to stop in 2 s . what is the car accelerathion

Answer 1

Hello there,

Given :

u = 10 m/s

v = 0 m/s when t = 2s

As we know

a = (v - u) / (t)

=> at = v - u

=> v = u + at

=> u + at = v

Substituting the given values

=> 10 + (2)(a) = 0

=> 10 + 2a = 0

=> 2a = -10

=> a = ½(-10)

Hence a = -5 m/s².

Hence the car was accelerating with -5m/s².

Hence the car was decelerating with 5 m/s².

The car had a retardation of 5 m/s².

Choose the answer according to the options.

Hope you find my answer useful.

Harith