Question

4. A car moving with a uniform velocity of 36km/h comes to stop in 3s. Find the retardation of the car in S.I units. a)330 ms-2 b) 3.3 ms-2 c) -3.3 m/s 2 d) none of these​

Answer 1

Answer:

u=36km/hr=10ms

−1

a=2.5ms

−2

,t=5sec

v=u+at

v=10+(2.5×5)

=22.5ms

−1

v

2

−u

2

=2as

⇒

2×2.5

22.5

2

−10

2

=s

s=81.25m