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61. A particle of mass 2 kg is moving in circular path with constant speed 20 m/s. The magnitude of change in velocitywhen particle travels from A to P will be

Answer»

From the figure , The initial velocity is 20i

and the final velocity is 20jso the change will be ∆v = 20j-20i

and |∆V| =√20²+20² = 20√2



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