Bierbank

Sitting down at the end of an empty ale-bench is usually a bad idea because the bank could overturn immediately. In the figure below, what is the weight needed on point \(B\) just enough to compensate a body weight of \(75\text{ kg}\) on point \(A?\)

Details and Assumptions:

  • The mass of the wooden panel is \(m = 12 \,\text{kg}.\)
  • The length of the bench is \(l = 2.2 \, \text{m}\) and its overhang is \(35\,\text{cm}\) on each side.
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