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Most Important Selected Qs for JEE AdvancedPhysicsLaws of Motion

All the surfaces & pulleys are frictionless in the shown arrangement. Pulleys P and Q are massless. The force applied by clamp on pulley P is

Options

  1. Am g 6 (- 3 i -3 j )
  2. Bmg 6 ( 3 i +3 j )
  3. Cmg 6 2
  4. Dnone of the above.

Correct answer

B. mg 6 ( 3 i +3 j )

Step-by-step solution

gathered 2 mg 30- T =2 ~m ( a ) T = ma a = g / 3 & ~T = mg 3 gathered Net force = Result of these forces =T(- j )+T 60^ (- j )+T 60(- i )=- 3 2 T i - 3 2 T j = m g 6 (- 3 i -3 j ) aligned & As net force in pulley =0 , & force by clamp = m g 6 ( 3 i +3 j ) aligned

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