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A beam 3m long is free to pivot up and down about the end attached to a wall. The mass of the beam is 25 kg and the cable supporting the beam can support a maximum force of 1800 N. What is the maximum mass that a man standing on the end can have before he snaps the cable. The angle of elevation between the cable and the beam is 30 degrees.

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**I tried converting the 25 kg to newtons, therefore getting me 245N and subtracting that from the 1800 (which I thought would be the easy way) and then dividing by 9.8 to get the mass in kg, but that ended up being incorrect.**

The correct asnwer is 79.3 Kilograms, but I would enjoy to know how to get to that conclusion.

The correct asnwer is 79.3 Kilograms, but I would enjoy to know how to get to that conclusion.