1. Tardigrade
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  4. A block of mass m is kept in equilibrium by a massless rope held by a monkey over a pulley as shown. Now the monkey begins to climb the rope. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/ac8ae929c1009f4e08a598efa7972223-.png /> Statement 1: The linear momentum of the monkey, rope and block system is conserved. Statement 2: Contact forces between the monkey and rope and the tension in rope are internal forces of the system.

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Q. A block of mass $m$ is kept in equilibrium by a massless rope held by a monkey over a pulley as shown. Now the monkey begins to climb the rope.
image
Statement 1: The linear momentum of the monkey, rope and block system is conserved.
Statement 2: Contact forces between the monkey and rope and the tension in rope are internal forces of the system.

Work, Energy and Power

Solution:

Statement-1 is false, Statement-2 is true. When the monkey climbs up the rope, the extra tension force acting on the pulley will provide for the change in momentum.