Question

A car moved with a
velocity 4m/s is stopped with in 8m. The retardation in the car is.....

(a) 2m/se
(b) 4m/se
(c) 1m/se
(d) 8m/s2​

Answer 1

Answer:

The answer will be -2m/sec^2

we know that velocity =distance/time,

4=8/t,

t=2secs,

Retardation means negative acceleration which shows that the velocity of body is decreasing.

Retardation=-a=rate of change of velocity,

=-a=4/2=-2m/s^2