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 8.00 m work plank which weighs 114 N and is secured with a hinge on the opposite end. Worker B will stand on the plank 4.88 m from worker A. Worker B also brings up his paint can, mc = 3.42 kg, which he places 0.430 m from where he is standing on the plank (between the two workers). Worker A unfortunately needs to supply 483 N of force to hold the end of the plank. How much does worker B weigh? The

Question

caozeyuan · Answer

Can someone expalin what's going on here. I am not EFL so don't really understand the english here

anonymous · Answer

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total f = 483 and you have the weight of can , plank and all distances ,so you can get f3 = worker  B weight.