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Torque

A young work crew is trying to quickly finish some touch-up painting to complete a job. Rather than setting up a secure work area, they decide to try a shortcut.Worker A will hold the far end of a 9.96 m work plank which weighs 111 N and is secured with a hinge on the opposite end. Worker B will stand on the plank 4.11 m fromworker A. Worker B also brings up his paint can, mc = 3.50 kg, which he places 0.340 m from where he is standing on the plank (between the two workers). Worker Aunfortunately needs to supply 509 N of force to hold the end of the plank. How much does worker B weigh? The acceleration due to gravity is g = 9.81 m/s2.
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Free body diagram of the plank-------------------------------------------------------------------------------------------------
answered by: MiShell
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