Question

Q-58. A bus starts from rest and attains
a velocity of 20m/s in 300s. Assuming
that acceleration is uniform, the
acceleration is
A) 1/25 ms -2
B) 1/21 ms 2
C) 1/19 ms 2
D) 1/15 ms 2​

Answer 1

Let the car takes t seconds from its start to meet the bus. Distance travelled by the bus in t seconds s = 12 t distance travelled by the car in t seconds,

s=12at2=12×1.2×t2

Hence, 12t=12×1.2×t2or,12×21.2=t

or, t=20seconds.