1. The problem statement, all variables and given/known data a toy race car of mass m is released from rest on the loop-the-loop track. if it is released at a height 2R above the floor, how high is it above the floor when it leaves the track, neglecting friction? (the radius of the loop is R) 2. Relevant equations E=K+U 3. The attempt at a solution there is not initial KE and no final KE initial PE is mg2R and final PE is mgh I just can't seem to put it all together, does this mean h=2R as well?