The lift raises a car of mass 850 kg to a height of 2.1 m. it uses a force of 8330 n and takes 4 seconds to raise the car. what is the power of the lift?

As we know that rate of work done is known as power

so here work done is given by

now we will have

Now here we will have

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.