MHT CET 2023 Physics question

Physics Laws of Motion MHT CET 2023

A particle is moving in a circle with uniform speed 'v'. In moving from a point to another diametrically opposite point.

(A)the momentum changes by mv
(B)the momentum changes by 2mvCorrect
(C)the kinetic energy changes by
(D)the kinetic energy changes by mv

Answer: (B)

Solution

Momentum is a vector. At a point it is along the tangent; at the diametrically opposite point the velocity is reversed, so the momentum is . Change in momentum , with magnitude : option (b). Kinetic energy

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Question ID VK-097222