Question

Brakes are applied to a car travelling at 30 m per second it's velocity is reduced to a 20 metre per second in 5 seconds calculate the retardation produced by the brake calculate distance covered in 5 seconds.

Answer 1

Answer:

retardation will be equal to -1/2ms-2

Explanation:

Answer 2

Answer:

-2 m/s^2

Explanation:

(1st part)

Use

the

relation- v=u+at , where v=Final velocity

u=intial velocity

a=acceleration(+ve value=acceleration, -ve value=retardation)

t=time taken

(2nd part)

Use the relation- s=ut+(1/2)at^2 , where s=distance travelled

u=initial velocity

t=time taken

a=acceleration