Question

A pulley system has an efficiency of 65.1%. If you perform 350 J of work, how much useful work does the pulley perform?

Answer 1

The work performed by you is 350 J ,but efficiency of pulley system is 65.1% .so ,work done by pulley system is the [(efficiency)/100] * Total work

Step-by-step explanation:

Work done = 350 J

efficiency of pulley = 65.1%

so,

work done by pulley = (65.1 /100)*350

=0.651 * 350

= 227.85 J

Useful work pulley perform = 227.85 J