Rotational Motion · Rotational dynamics
Two masses m and 2m are connected by a light string going over a pulley (disc) of mass 30m with radius m. The pulley is mounted in a vertical plane and it is free to rotate about its axis. The 2m mass is released from rest and its speed when it has descended through a height of 3.6 m is m/s. (Assume string does not slip and )
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