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Q.

A particle is moving along a circular path of radius 5 m with a uniform speed 5ms-1. 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

5π m/s2

answer is D.

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Detailed Solution

detailed_solution_thumbnail

When it goes to opposite diametrical point, change in velocity is V-(-V)=2V

Time taken to travel half the circle is πrV

Average acceleration =2V2πr=2×25π×5=10πm/s2

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