1.

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

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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