Question

A car moving with a velocity of 10 ms and
with a uniform acceleration gains a velocity of
30 ms after travelling a distance of 4 km.
The time taken is​

Answer 1

Answer:

t=0.5s

Explanation:

use kinematic equations,

v^2-u^2=2as

• v=ginal velocity
• u=intial velocity
• a=acceleration
• s=displacement

so, 30×30-10×10=2×a×4

a=100ms^2

now use v=u+at formula

30=10+100t

30-10=100t

20=100t

t=0.5s