Question

A bus is travelling at a speed of 72km/h brakes are applied so as to produce an acceleration of 0.5 m/s square . Find how far the bus will go before it is brought to rest.

Answer 1

Given :-

Initial speed of the train, u = 72 km/h = 25 m/s

Final speed of the train, v = 0

Acceleration = - 0.5 m/s²

To Find :-

Distance acquired

Formula to be used :-

Third equation of motion:

v² = u² + 2 as

Solution :-

Putting all the value, we get

⇒ v = u2 + 2 as

⇒ (0)2= (25)2 + 2 ( - 0.5) s

⇒ s = 625 m

Hence, The train will cover a distance of 625 m before coming to rest.