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

• A. 2 N
• B. 20 N
• C. 50 N
• D. 100 N

Answer 1

Answer: (A)

2 N

Answer 2

$F = \frac { W } { \mu }$ $\therefore$ $W = \mu F = 0.2 \times 10 = 2 N$