1. The problem statement, all variables and given/known data A 0.27 kg toy car is held at rest against a 1796 N/m spring compressed a distance of 8cm. When released, the car travels a distance of 112cm along a flat surface before reaching a 0.30m high loop. The friction coefficient of the flat surface and the toy car is (0.4, 0.18). Assume friction is so small in the loop that it can be ignored. Question 1: What is the velocity of the toy car the moment it reaches base of the loop? Question 2: What is the velocity of the toy car when it reaches the top of the loop? 2. Relevant equations Solving question 1 Evaluation of toy car from release to bottom of loop using work-energy: EEi + W = 1/2 (0.27) vf2 1/2 (1796)(0.08)2 + (0.47628)(0.08 + 1.12) cos(180)= 0.135 vf2 5.7472 – 0.571536 = 0.135 vf2 vf = 6.19m/s when toy car reaches the base of the loop 3. The attempt at a solution As seen in #2 above, I know how to solve for the first question. However, I am at a complete loss as to how we approach the second part? We have dealt with uniform circular motion with no gravity and uniform circular motion with movement perpendicular to gravity, but never one where the direction of movement is constantly changing with respect to the direction of gravity. I am at a loss as to what equation I could even use that would take everything I need into consideration?