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

$Power = \frac{work}{time}$

$Power = \frac{17493}{4} Watt$

$Power = 4373.25 Watt$