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A painter is applying force himself to raise him and the box with an acceleration of `5m//s^(2)` by a massless rope and pulley arrangement as shown in fig Mass of painter is 100 kg and that of box is 50 kg if `g=10 m//s^(2)` then: A. tension in the rope is 1125 NB. tension in the rope is 2250 NC. force of contact between the painter and the floor is 375 ND. none of these |
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Answer» Correct Answer - A::C For the system, the eqn. of motion is `2T-(M+m)g=(M+m)a` `2T=(M+m)(g+a)` `2T=(100+50)(10+5)` `T=1125 N` For the painter the eqn. of motion is `R+T=m(g+a)` `R+1125=100(10+5)` `R=375 N` |
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