Riding a Loop-the-Loop. A car in an amusement park ride rolls without friction around a track. The car starts from rest at point A at a heighth above the bottom of the loop. Treat the car as a particle. (a) What is the minimum value of h (in terms of R) such that the car moves around the loop without falling off at the top (point B)? (b) If h = 3.50R and R = 14.0 m, compute the speed and radial acceleration at point C at which is halfway down to the bottom of the circular path? Hint: Solve for minimum speed at the top of the loop. Use net force F = mg =mv^2/R where normal force N = 0 at minimum speed. B CR

Riding a Loop-the-Loop. A car in an amusement park ride rolls without friction around a track. The car starts from rest at point A at a heighth above the bottom of the loop. Treat the car as a particle. (a) What is the minimum value of h (in terms of R) such that the car moves around the loop without falling off at the top (point B)? (b) If h = 3.50R and R = 14.0 m, compute the speed and radial acceleration at point C at which is halfway down to the bottom of the circular path? Hint: Solve for minimum speed at the top of the loop. Use net force F = mg =mv^2/R where normal force N = 0 at minimum speed. B CR