Engineering Board Exam Reviewer · Engineering Mechanics · easy
A 10 kg block rests on a horizontal surface with a coefficient of friction of 0.2. What is the minimum horizontal force required to start moving the block?
- 19.62
- 490.5
- 2
- 78.48
Answer
A. 19.62
Solution
Weight W = mg = 10 × 9.81 = 98.1 N. Since the surface is horizontal, N = W. Maximum static friction Ff = N = 0.2 × 98.1 = 19.62 N.
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