Question

Paragraph: A body of mass 10 kg starting from rest accelerates uniformly to speed of 30 m/sec in 10 sec. Brakes are applied and the body stops in next 5 sec.The ratio of acceleration to retardation of the car is​

Answer 1

Answer:

The accelerating force and the stopping force​ are 30 N and (-60 N) respectively.

Explanation:

Given,

m=10kg

u=30m/s

v=0m/s

t=5sec

As we know Force=mass×acceleration

& secondly acceleration=v-u/t. So,

F=10kg×0-30/5

F=10×6

Then,F=60N