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A Monkey of mass m climbs up to a rope hung over a fixed pulley with acceleration g/4. The opposite end of the rope is tied to a block of mass M lying on a rough horizontal plane. The coefficient of friction between the block and horizontal plane is μ . Find the tension in the rope.


A Monkey of mass m climbs up to a rope hung over a fixed pulley with acceleration g/4. The opposite end of the rope is tied to a block of mass M lying on a rough horizontal plane. The coefficient of friction between the block and horizontal plane is μ. Find the tension in the rope.


823_32898_monkey.jpg

Grade:12th Pass

1 Answers

Aman Bansal
592 Points
8 years ago

Dear utkarsh,

Newton’s third law states:

If two objects interact, the force F12 exerted by object 1 on object 2 is equal in magnitude to and opposite in direction to the force F21 exerted by object 2 on object 1:

F12 = -F21

This law can be understood by considering the following example. When you hit a football with a barefoot, the foot hurts less if you hit it softly and it hurts more if you hit it with greater strength. Thus, the football exerts as much force on your foot as you hit it with. Now, there can be a confusion regarding this rule when you think of all the bodies that the earth is attracting with its force of gravitation. What about the force they exert back on the earth? This is very true, anything that the earth attracts towards itself also attracts the earth towards themselves with a force equal to the magnitude of g (acceleration due to gravity), but the mass of earth is so large as compared to the magnitude of force applied that it effectively remains at rest whereas the body accelerates towards it and falls on the surface of the earth.

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Thanks

Aman Bansal

Askiitian Expert

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