plank weight trough

plank weight trough

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A plank of weight W and length lies in a smooth circular trough of radius . At one end of the plank is a weight W/2. Calculate the angle θ at which the plank lies when it is in equilibrium.

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Solutions (listed by author)

Michael A. Gottlieb (pdf, 69K) [Much thanks to Julien Clément-Cottuz for his comments and corrections. ―mg]

Sukumar Chandra (using torque) (pdf, 76K)

Sukumar Chandra (using potential energy) (pdf, 75K)