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Mathematics 6 Online
OpenStudy (anonymous):

MC question! A 20N block is being pushed across a horizontal table by an 18N force. If the coefficient of kinetic friction between the block and the table is 0.4, find the acceleration of the block. A. 0.5 m/s^2 B.. 1 m/s^2 C. 5 m/s^2 D. 7.5 m/s^2 E. 9 m/s^2 - Answer's C, but I'm not sure why?

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