Question

You do 1260 J of work with a wheel and axle. If the wheel and axle does 1200 J of work, what is the efficiency of the wheel and axle?

• A. More than 95 %
• B. Equal to 95 %
• C. Less than 95 %
• D. Less than 83.33 %

Answer 1

The correct option is A More than 95 %

$\eta =\frac{Load}{effort}\ast 100=\frac{1200}{1260}\ast 100=95.23\%$