Question 46
Simple MachinesA machine has a velocity ratio of 4. If it requires 800 N to overcome a load of 1600 N, what is the efficiency of the machine?
- A.2%
- B.40%
- C.50%
- D.60%
Show the answer and explanation
Answer: C (50%)
Explanation
MA = load ÷ effort = 1600 ÷ 800 = 2. Efficiency = MA/VR × 100% = 2/4 × 100% = 50%.