Question

A bus acquires a velocity of 36 km/hr in 20 seconds just after the start. It takes 40 seconds to stop. Find the ratio of acceleration to retardation in these cases.

Answer 1

Answer:

0.5/0.25 = 1/2 / 1/4

Explanation:

first find acceleration

a=vf-vi/t

= 36x10/36 - 0 / 20

= 10/20

= 1/2

then find deceleration

d=vf-vi/ t

= 0-36x10/36 / 40

= -10/40

= -1/4