Question

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?

Answer 1

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

so here work done is given by

`W = F.d`

`F = 8330 N`

`d = 2.1 m`

now we will have

`W = 8330(2.1) J`

`W = 17493 J`

Now here we will have

`Power = (work)/(time)`

`Power = (17493)/(4) Watt`

`Power = 4373.25 Watt`