Question

Sunder starting from rest attains velocity of 30m/s after covering discplacement of 100m.Calculate acceleration and time taken?

Answer 1

u = 0 m/s

v = 30 m/s

s = 100 m

as v^2 - u^2 = 2as

so, 30^2 - 0 = 2a*100

or, 900/200 = a

so, a = 4.5 m/s^2

Also, v = u + a t

so, 30 = 0 + 4.5 * t

so, t = 30/4.5 = 6.667 s

Hence, accleration,a = 4.5 m/s^2 and

time , t = 6.667 s.