Static friction
Question
A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is
Moderate
Solution
µN = mg ⇒ µ x 10 = mg
0.2 x 10 = mg ⇒ mg = 2N ⇒ w = 2N
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