A machine requires 1000J of work to raise a load of 500N through a vertical distance of 1.5m. Calculate the efficiency of the
A
80%
B
75%
C
50%
D
33%
Verified Correct Answer: B.
Physical Principles & Numerical Solution
\(\frac{500 \times 1.5}{100.0}\) x 100%
= 75%
Source: Myschool Past Questions Archive (Record #28050)