1. The problem statement, all variables and given/known data A block of mass M=2kg with a semicircular track of radius R=1.1m rests on a horizontal frictionless surface.A uniform cylinder of radius r=10cm and mass m=1kg is released from rest from the top most point .The cylinder slips on the semicircular frictionless track.The speed of the block when the cylinder reaches the bottom of the track is:(g=10m/s). A)√10/3 B)√4/3 C)√5/2 D)√10. 2. Relevant equations conservation of momentum. vcentre of mass= v1m1 + v2m2/m1 +m2. 3. The attempt at a solution I am not very sure how to solve it. I tried to calculate the speed of the cylinder at the bottom. Consider the the bottom of the semicircular track to be h m above the surface. v1=0m/s mg(h+1.1) -mgh= 1/2m(v22-v12) 2*10*1.1=v22. v2=√22 m/s. then using conservation of momentum, I tried to find the velocity of the block but the answer doesn't match. How do I solve this?