Which of the following is NOT an example of zero work ?
Answer & explanation
Correct answer: option 2
- In circular motion, the net displacement is zero. So the work done is zero too. Thus, \(W = zero\)
- The force is in forward direction and so is the displacement. Thus, \(W \neq zero\)
- The work is done against the gravitational force which acts downwards. The displacement is forward in direction. Thus, \(W = zero\)
- The force is in action but there is NO displacement. Thus, \(W = zero\)