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Suppose the force of kinetic friction on a sliding block of mass m is 2.5 N [backward]. What is the force of kinetic friction on the block if another block of mass 2m is placed on its upper surface?
6 years ago

Answers

henry2,
Mass = M, Ff = 2.5 N.
Mass = M + 2M = 3M, Ff = 3 * 2.5 = 7.5 N. = Force of friction.


6 years ago

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