Monday, September 25, 2017

homework and exercises - How to find direction of friction on a banked curve?


problem



I don't understand how the force of friction can face a different direction in each case. To my understanding, without friction there is a net force down the slope. We want the net force to be towards the right (centripetal acceleration). So why isn't the force of friction always up the slope to cancel the y component of the net force?




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