science

Grade-9

Easy

Question

# A bus starts from rest and attains a velocity of 30 m/s in 5 s. Its acceleration is ____ m/s^{2}.

Hint:

### 6 m/s²

## The correct answer is: 6

### Given that,

The initial velocity, u = 0

The final velocity, v = 30 m/s

Time taken, t = 5 s

On using the first equation of motion we get,

v = u + at

Or, a = (v – u)/t

Or, a = (30 – 0)/5

Or, a = 30 / 5

Or, a = 6 m/s^{2}

Therefore, the acceleration of the bus is 6 m/s^{2}.

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