Q. Tracks consist of a frictionless arc XY. Which is a quarter-circle radius R and a rough horizontal section YZ. Block A of mass M is released from rest at point X, slides down the curved section of the track, and collides instantaneously and in elastically with identical block B at point Y. the two block move together to the right, sliding pasy point P which is a distance L from point Y. The coefficient kinetic friction between the blocks and the horizontal part of the track is μ . Express your answer in terms of M, L, μ , R, and g

1) Determine the speed of the block A just before it hits the block

2) determine speed of the combined block immediately after collision

3) The specific heat capacity of the material use to make the block is C resolve the temperature rise that results from the collision in terms of C and the other given quantities.( suppose that no energy is transferred to the track or the surrounding air of the block)