5. A wooden block of mass 3m lies on the horizontal section of a frictionless track. The track continues to the right with a circular loop of radius R. A small bullet of mass m is red from a gun with an initial velocity Va. The bullet strikes the block and remains embedded in the block as it moves around the circular section. a. Find the minimum velocity ofthe bullet that enables the block to rise to the top ofthe loop. b. Find the minimum velocity ofthe bullet that enables the block to complete the loop. c. Find the normal force on the block from the ramp when it returns to the lowest point of the loop