Question

The brakes applied to a car produce a uniform retardation of 0.5m/s^2 the car covers a distance of 16 m before stopping. how long were the brakes applied?​

Answer 1

Answer:

t=8sec

Explanation:

Given-

v=0m/s

a=-0.5m/s^2

s=16m

t=?

u=?

v^2=u^2+2as

0^2=u^2+2×-0.5×16

-u^2=-16

u=root16

u=4m/s

v=u+at

0=4+(-0.5)t

-4=-0.5×t

t=4/0.5

t=8sec