Question

A bus travelling with a velocity 20 m/s changes its velocity to
60 m/s in 5 s. What is its acceleration?​

Answer 1

Given :-

Initial velocity of the bus travelling = 20 m/s

Final velocity of the bus travelling = 60 m/s

Time taken by the bus = 5 sec

To Find :-

The acceleration of the bus travelling.

Analysis :-

Here we are given with the initial velocity, final velocity and the time taken by the bus in travelling.

In order to find the acceleration of the bus substitute the values given in the question accordingly.

Solution :-

We know that,

• u = Initial velocity
• t = Time
• v = Final velocity
• a = Acceleration

Using the formula,

$\underline{\boxed{\sf First \ equation \ of \ motion=v=u+at}}$

Given that,

Initial velocity (u) = 20 m/s

Final velocity (v) = 60 m/s

Time (t) = 5 sec

Substituting their values,

⇒ 60 = 20 + a × 5

⇒ 5a = 60 - 20

⇒ 5a = 40

⇒ a = 40/5

⇒ a = 8 m/s²

Therefore, the acceleration of the bus is 8 m/s².