Question

Find the initial velocity of a car which stpos in 10 second after applying break at the rate of 2m/ s square

Answer 1

initial velocity = u

final velocity =v=10

v-u/t

10-0/2

10/2

5=u

Answer 2

Answer:

20 m/s

Explanation:

from Newton second law ,

ma= dp/dt

m*2=dp/10

dp=20m

MV=20M

V=20