Which of the following statements is correct about a machine?
PHYSICS
JAMB 2016
Which of the following statements is correct about a machine?
- A. Efficiency of a machine is always greater than I
- B. Efficiency decreases with an increase in friction
- C. Velocity ratio depends on friction
- D. Mechanical advantage increases with an increase in friction
Correct Answer: B. Efficiency decreases with an increase in friction
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