(5 marks) A cylinder of mass m = 15 kg sits on top of a block with mass M = 30 k

Question

(5 marks) A cylinder of mass m = 15 kg sits on top of a block with mass M = 30

kg, as shown. The coefficient of static friction between the two blocks is ?s = 0.8. The

coefficient of kinetic friction between the floor and the bottom package is ?k = 0.1.

The top block is pushed with a horizontal force as shown. What is the maximum force

you can push the top package without it sliding on the bottom block? The friction is

such that the bottom block moves before the package begins sliding.

(a) 154 N

(b) 309 N

(c) 103 N

(d) 206 N

(e) None of the above, or impossible to tell.

Explanation / Answer

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