Question

Reena lifts a luggage of mass 10 kg to a height of 60 m from the ground in 25 sec, find the power spent by Reena?

1) 24 W
2) 2.4 W
3) 2400 W
4) 240 W​

Answer 1

Given,

Mass of luggage = 10 kg

Height = 60m

Time = 25 second

To find,

Power spent by Reena.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

First of all, we have to calculate the work done by Reena.

Work done = mass × gravitational acceleration × height

Here,

We will assume that, gravitational acceleration = 10 m/s²

So,

Work done = 10 × 10 × 60 = 6000 Joules

Now,

Power = Work done/ Time = 6000/25 = 240W

Hence, the amount of power spent by Reena is 240 W (option 4).