A particle of mass $M$ is moving in a horizontal circle of radius $R$ with uniform speed $v$. When i

Question

A particle of mass $M$ is moving in a horizontal circle of radius $R$ with uniform speed $v$. When it moves from one point to a diametrically opposite point, its\

Professor PC Thomas Classes · Answer

(c) : On the diametrically opposite points, the velocities have same magnitude but opposite directions. Therefore change in momentum is $$ M v-(-M v)=2 M v $$