Two identical balls of mass m are attached to the ends of a massless rod of length L. The rod is placed in a corner in its vertical position and we move the lower ball in the horizontal direction with constant speed v. The rod moves in the vertical plane, the friction is negligible everywhere. a) Give the speed and acceleration of the upper ball as a function of the angle α between the rod and the horizontal. b) Give the normal force exerted by the wall as a function of α. c) At which angle α* will the upper ball lose the contact with the wall? Calculate α∗ if L = 1,0 m and v = 0,20 m/s

Two identical balls of mass m are attached to the ends of a massless rod of length L. The rod is placed in a corner in its vertical position and we move the lower ball in the horizontal direction with constant speed v. The rod moves in the vertical plane, the friction is negligible everywhere. a) Give the speed and acceleration of the upper ball as a function of the angle α between the rod and the horizontal. b) Give the normal force exerted by the wall as a function of α. c) At which angle α* will the upper ball lose the contact with the wall? Calculate α∗ if L = 1,0 m and v = 0,20 m/s

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