ch05-p019 - 19. (a) Since the acceleration of the block is...

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19. (a) Since the acceleration of the block is zero, the components of the Newton’s second law equation yield T mg sin θ = 0 F N mg cos = 0. Solving the first equation for the tension in the string, we find Tm g == ° = sin . . 85 9 8 30 42 2 kg m / s N . b gc h (b) We solve the second equation in part (a) for the normal force F N : () 2 cos 8.5 kg 9.8 m/s cos 30 72 N . N Fm g ° = (c) When the string is cut, it no longer exerts a force on the block and the block
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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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