Questions
A man of mass 60 kg is standing on a massless plank and holding a string passing over a system of ideal pulleys. A mass of 20 kg hanging over a light pulley such that the system is in equilibrium. The force exerted by the plank on the man is (g=acceleration due to gravity).
detailed solution
Correct option is A
For the man 2T+R = 60g .............(1)For the 20 kg mass ,T = 20 g ....................(2)R = 60 g - 2X 20 g = 20 gTalk to our academic expert!
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A uniform sphere of weight W and radius 3 m is being held by a string of length 2m.attached to a frictionless wall as shown in the t figure. The tension in the string will be:
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