Question

A body is moving with a velocity of 25m/s. At any velocity v its acceleration depends as -5√v. Find time taken for the body to come to rest

Answer 1

Answer:

initial velocity=25m/s

a=-5√25=-25m/s^2

final velocity=0m/s

v=u+at

0=25-25t

t=1sec

Answer 2

Answer:

as initial velocity 25m/s

at rest final velocity will be 0m/s

acceleration = (v-u)/t = -5(u)^(1/2) -5(25)^(1/2)=(0-25)/t

-5×5=-25/t

-25×t=-25

t=-25/-25

t=1 second

Hope it helps you