got this weirld physics question from teacher a segment of a roller coaster ride consists of a ramp and a 360 turn as shown above. Assuming that the initial velocity of the car at the top of the ramp is 0, wat is the minimum value of h for the car to be able to complete the 360 turn without stopping, assuming that the rail is frictionless and there is no other external forces, except for gravity.


so use conservation of energy, so h = 2r, but teacher said its wrong, HJ pointed out that in that case the car would stop at the top instead, so h>2r


but after sometime, thought that if the speed at the top was too low, the car would fall off, so let the speed required for the car to stay up there be x. after some weirld equations, increasing h by r/2 would increase the speed by x, so thus h > 2.5r

seem too easy hmmm....., any1 has any other answers, circular motion is not susposed to be so simple..... so i dun think its right
Sianz ppl | 10:54:00 pm