MCQ

A motorcycle is being driven at a speed of 20 m/s when brakes are applied to bring it to rest in five seconds. The deceleration produced in this case will be :

#### Options

+ 4 m/s

^{2}− 4 m/s

^{2}+ 0.25 m/s

^{2}−0.25 m/s

^{2}

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#### Solution

We have,

Initial velocity = 20 m/s

Final velocity = 0 m/s

Time taken = 5 sec.

So,

Deceleration = – Acceleration

= –(0 – 20)/5

= 4 m/s^{2}

So, the answer is + 4 m/s^{2}

Concept: Motion and Rest

Is there an error in this question or solution?

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