Answer:
Option D
Explanation:
The work done can be given by the mechanical energy used to do work, i.e., Kinetic energy and potential energy provided to do the work.
In all the cases, except option D, the energy provided to do the useful work is not zero and hence work done is not zero.
In option D, the box is being pulled with constant velocity, making the acceleration zero and thus Kinetic energy of the system is zero. Hence work done in this case is zero.
Answer: I would say it would be 3.9
but i believe there is something missing shorty.
There’s 10mm in a cm: 22mm
Easier to write, easier to read, easier to understand, easier to compare
