Our 10kg mystery box rests on a horizontal floor. The

Question

coefficient of static friction is 0.4 and the coefficient
of kinetic friction is 0.3. Determine the force of
friction acting on the box if a horizontal external
applied force is exerted on it of magnitude:
• (a) 0, (b) 10 N, (c) 20 N, (d) 38 N, and (e) 40 N.

Answer 1

7 8 9 10

Answer 2

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