Question

4. A bus at rest accelerates uniformly to a velocity of 54 km/hr in 20s. How much distance is travelled by the bus in 20s​

Answer 1

Answer:

Bus travelled a distance of 150 m.

Explanation:

Initial Velocity of the bus = 0 m/s

Final Velocity of the bus = 54 km/hr or 15 m/s

Time taken = 20 s

Acceleration =

$(v - \frac{u}{t} )$

Acceleration: 15/20

Acceleration: 0.75 m/s square..

Let us use the third equation of motion,

$2as \: = \: {v}^{2} - {u}^{2}$

2(0.75)s = 225 - 0

1.5 s = 225

s = 225/1.5

s = 150 m