Question

OR
2,3) Swarali takes 40sec to carry a bag weighing 20kg to a height of 5 meter. How much
power has she used?​

Answer 1

Answer:

Power used by Swarali  is 24.5 W.

Explanation:

Given:

m = 20 kg

h = 5 m

t = 40 s

To find:

We have to find power used by  Swarali to carry bag.

Force applied by  Swarali,

F = mg = 20 * 9.8

F = 196 N

Work done by Swarali to carry the  bag to a height of 5 m,

W = F s = 196 * 5 = 980 J

By using the formula of Power,

Power = work / time

Power = 980/20

Power = 24.5 W

Therefore, Power used by Swarali is 24.5 W.