Question

please answer this question

Answer 1

Given Displacement,s=30m
acceleration,a=2.0m/s

Now we have The equation.
s=ut+(at²)/2

here, u is 0( since body Starts at rest)

So
s=at²/2
→2s=at²

→2×30=2×t²
→30=t²
→t=√30 sec.
→t=5.477sec. (approx.)

Hope this is the answer you are looking for.

Regards,
Leukonov.

Answer 2

by using the formula s=ut+1/2 at^2
having displacement(d)=30m
acceleration(a)=2m/s^2
initial velocity(u)=0
so,30= 0 +1/2 x 2 x t^2
=>30=t^2
=>t = 5.48sec....