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Unformatted text preview: the track at the top? Which factors determine if the ball stays in contact with the track? Loop the Loop What is the minimum speed such that the ball stays in contact with the track? solution A: W N a y Σ F y = N + W = m a Loop the Loop What is the minimum speed such that the ball still stays in contact with the track? Ball falls if N = 0 The corresponding minimum speed is: A : F y = N + W = ma å a = v 2 R N = 0 v = gR Car going over bump How fast must the car go to become airborne? Summary Dynamics with curved motion a T =v 2 /R a p =dv/dt Bumps and loops Leave surface: N=0...
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 Fall '07
 LECLAIR,A
 Circular Motion, Force, Rotation, Frame of reference, minimum speed

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