Q.

A particle is moving on a circular path of radius r with uniform velocity v. The change in velocity when the particle moves from P to Q is ∠POQ=40∘

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a

2vcos⁡40∘

b

2vsin⁡40∘

c

2vsin⁡20∘

d

2vcos⁡20∘

answer is C.

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Detailed Solution

Change in velocity =2vsin⁡(θ/2)=2vsin⁡20∘
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A particle is moving on a circular path of radius r with uniform velocity v. The change in velocity when the particle moves from P to Q is ∠POQ=40∘