A mass of 10 kg lies on a smooth plane which is inclined at THETA to the horizontal. The mass is 5m from the top measured along the plane. One end ofa light inextensible string is attached to this mass; the string passes up the line of greatest slope and over a smooth pulley fixed at the top of the slope. The other end is attached to a freely suspended mass of 15 kg. This 15 kg mass is 4m above the floor. The system is released from rest and the string first goes slack 1 3/7 s later. Find the value of THETA?
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