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Q.

A bus starting with a speed of 12 m/s slows down to 6 m/s in 3 s. The average acceleration of the bus is

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a

2 ms−2

b

−2 ms−2

c

4 ms−2

d

3 ms−2

answer is D.

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Detailed Solution

Initial speed(u)=12m/s, Final speed(v)=6m/s, time taken t = 3 s

acceleration (a)=v−ut=6−123=−63=−2m/s2

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