Q151 / 160 · TS EAMCET 2017 · Physics

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

  • A
    momentum does not change
  • Correct answer
    B
    momentum changes by $2 M N$
  • C
    kinetic energy changes by $\frac{\mathrm{MV}^2}{4}$
  • D
    kinetic energy changes by $M V^2$

Solution

Given, Velocity of particle $=v$ Change in momentum = final momentum - initial momentum $=M v-(-M v)=2 M v$

Hence, the correct answer is option: 'B'.

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