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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A pulley is radius 2 m is rotated about its axis by a force F= (20 t − 5 t^2) newton ( where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m^2 the number of rotations made by the pulley before its direction of motion is reversed, is:

A pulley is radius 2 m is rotated about its axis by a force F= (20 t − 5 t^2) newton ( where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m^2 the number of rotations made by the pulley before its direction of motion is reversed, is:

A weightless rod of length l with a small load of mass m at the end is hinged at point A as shown and occupies a strictly vertical position touching a body of mass M. A light jerk sets the system in motion. a. For what mass ratio M/m will the rod form an angle α=π/6 with the horizontal at the moment of the separation from the block?