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A simple pendulum, made of a string of length l and a bob of mass m, is released from a small angle θ _0. It strikes a block of mass M, kept on…

JEE Main 2019 — Physics Mechanics

2019mcqhard

A simple pendulum, made of a string of length lll and aaa bob of mass m,m,m, is released from a small angle θ0.{\theta }_{0}.θ0​. It strikes a block of mass M,M,M, kept on horizontal surface at its lowest point of oscillations, elastically. It bounces back and goes up to an angle θ1.{\theta }_{1}.θ1​. Then MMM is given by:

Official previous-year question

Held on 12 Jan 2019 · Verified 6 Jul 2026.

Options

  1. A

    m(θ0−θ1θ0+θ1)m(\frac{{\theta }_{0}-{\theta }_{1}}{{\theta }_{0}+{\theta }_{1}})m(θ0​+θ1​θ0​−θ1​​)

  2. B

    m(θ0+θ1θ0−θ1)m(\frac{{\theta }_{0}+{\theta }_{1}}{{\theta }_{0}-{\theta }_{1}})m(θ0​−θ1​θ0​+θ1​​)

  3. C

    m2(θ0+θ1θ0−θ1)\frac{m}{2}(\frac{{\theta }_{0}+{\theta }_{1}}{{\theta }_{0}-{\theta }_{1}})2m​(θ0​−θ1​θ0​+θ1​​)

  4. D

    m2(θ0−θ1θ0+θ1)\frac{m}{2}(\frac{{\theta }_{0}-{\theta }_{1}}{{\theta }_{0}+{\theta }_{1}})2m​(θ0​+θ1​θ0​−θ1​​)

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