Question

a car moving at a speed of 5 metre per second in a sudden break applied it came to rest after 10 seconds then find the acceleration​

Answer 1

Explanation:

u=5m/s , v=0m/s, t=10s

using 1st equation of motion

v=u +at

0=5+a10

-5=10a

-5/10=a

-0.5=a

or u can also do it by using

a=v-u /t

Answer 2

Explanation:

initial velocity= 5m/s

final velocity=0m/s

time=10sec

acceleration=?

sol

acceleration=final velocity-initial velocity/time

a=0-5/10

=-5/10

=-1/2

=-0.5

it's means retardation is there...