6. Intro to Forces (Dynamics)
Newton's Third Law & Action-Reaction Pairs
4:10 minutes
Problem 7b
Textbook Question
Textbook QuestionA house painter uses the chair-and-pulley arrangement of FIGURE P7.45 to lift himself up the side of a house. The painter's mass is 70 kg and the chair's mass is 10 kg. With what force must he pull down on the rope in order to accelerate upward at 0.20 m/s².
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