A 60-kg house painter stands on a 15-kg aluminum platform. The platform is attached to a rope
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A 60-kg house painter 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).
(a) To accelerate herself and the platform at a rate of 0.8 m/s2, with what force must she pull on the rope?
(b) When her speed reaches 1 m/s, she pulls on such a way that she and the platform go up at a constant speed. What force is she exerting on the rope?
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Related Book For
Fundamentals of Ethics for Scientists and Engineers
ISBN: 978-0195134889
1st Edition
Authors: Edmund G. Seebauer, Robert L. Barry
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