A particle is moving on a circular path of radius r with uniform velocity v . change in velocity whe

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3-2.Motion in Plane

easy

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 $(\angle POQ = 40^\circ )$

A$2v\,\cos \,\,40^\circ $

B$2v\,\sin \,\,20^\circ $

C$2v\,\sin \,\,40^\circ $

D$2v\,\cos \,\,20^\circ $

Solution

(b) $\Delta v = 2v\sin \left( {\frac{\theta }{2}} \right) = 2v\sin 20^\circ $

Standard 11

Physics

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