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A painter is applying force himself to raise him and the box with an acceleration of `5(m)/(s^2)` by a massless rope and pulley arrangement as shown in figure. 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 painter : `R = T - mg = ma` `R + T = m(g+a)` ….(1) For the system : `2T -(m _M) g = (m+M)a` `2T = (m+M) (g+a)`…(2) where , `m = 100 kg` `M = 50 kg` `a = 5 m//sec_(2)` `:. T = (150 xx 15)/(2) = 1125 N` and , `R = 375 N`. |
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