Question

The velocity acquired by a body moving with uniform acceleration is 12 ms-1 in 2sand18 ms-1 in 4 s. Find the initial velocity of the body.

Answer 1

Answer:

According to question

at t=2s , v=30m/s

at t=4s , v=60m/s

So,

acceleration =

dt

dv

=

4−2

60−30

=15m/s

2

a=15m/s

2

from 1

st

equation of motin is first case

v=u+at

30=u+15(2)

u=0m/s