Q.

A particle is moving along a circular path of radius 5 m and with uniform speed 5 m/s. What will be the average acceleration when the particle completes half revolution

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a

zero

b

10m/s2

c

10πm/s2

d

10/πm/s2

answer is D.

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Detailed Solution

The change in velocity when the particle completes half revolution is given byΔV=5m/s−(−5m/s)=10m/sTime taken to complete half revolutiont=πrv=π×55=π∴  Average acceleration =Δvt=10πm/ss=10πm/s2
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