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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 : - Science

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/s2

  • − 4 m/s2

  • + 0.25 m/s2

  • −0.25 m/s2

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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/s2
So, the answer is + 4 m/s2

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APPEARS IN

Lakhmir Singh Science Class 9 Physics
Chapter 1 Motion
MCQ | Q 48 | Page 42
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