A 60-kg housepainter stands on a 15-kg aluminum platform. The platform is attached to a rope that passes through an overhead pulley, which allows the painter to raise herself and the platform (Figure 4-57).

(b)(b) When her speed reaches 1.0 m/s1.0 \mathrm{~m} / \mathrm{s}, she pulls in such a way that she and the platform go up at a constant speed. What force is she exerting on the rope now? (Ignore the mass of the rope.)


Answered 1 year ago
Answered 1 year ago
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Information given in the text: mpainter=60kgm_{painter} = 60\,\mathrm{kg} mplatform=15kgm_{platform} = 15\,\mathrm{kg} a=0.8ms2a = 0.8\,\mathrm{\tfrac{m}{s^2}} v=1.0msv = 1.0\,\mathrm{\tfrac{m}{s}}

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