Ch06-p046 - 46 We will start by assuming that the normal force(on the car from the rail points up Note that gravity points down and the y axis is

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46. We will start by assuming that the normal force (on the car from the rail) points up. Note that gravity points down, and the y axis is chosen positive upwards. Also, the direction to the center of the circle (the direction of centripetal acceleration) is down. Thus, Newton’s second law leads to 2 . N v Fm g m r §· −= ¨¸ ©¹ (a) When v = 11 m/s, we obtain
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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