【Daily Question】Theoretical Foundation 2020.01.30
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Multiple-choice question: A homogeneous cylinder of weight P and diameter D has a mass of m and a radius of r; it is placed on two smooth inclined planes. With a force F acting in the direction indicated, when the cylinder does not move, the magnitude of the restraining force at contact surface 2 is ( ). Answer: A Hint: An additional reward will be given to those who can explain the solution process; the answer can be seen there!
A. For the moment equilibrium equation at point 1, that is, N2R + F*R/√2 = P*R/√2, a solution can be obtained.