Mathematics (AS & A Level) · May / June 2018 · Paper 41 · Question 7

45Å 30Å P A B 0.8 kg 1.2 kg The diagram shows a triangular block with sloping faces inclined to the horizontal at 45Å and 30Å. Particle A of mass 0.8 kg lies on the face inclined at 45Å and particle B of mass 1.2 kg lies on the face inclined at 30Å. The particles are connected by a light inextensible string which passes over a small smooth pulley P fixed at the top of the faces. The parts AP and BP of the string are parallel to lines of greatest slope of the respective faces. The particles are released from rest with both parts of the string taut. In the subsequent motion neither particle reaches the pulley and neither particle reaches the bottom of a face.

Read automatically from the paper; the printed page above is exact.