Question

two labour A and B were given a task to carry 20 kg load from ground level to height 10 m.A completed the work in 40s and B in 60s. calculate the power in both the cases.who has greater power​

Answer 1

Answer:

Boy A has got MORE POWER than Boy B!

Explanation:

If 'g' = 10 m/s2,

Force = mass * 'g' = 20 * 10 = 200 N.........displacement (s) = 10 m

Work = F * s = 200 * 10 = 2000 J

Power of boy A to carry 20 kgs to 10 m = Work / Time = 2000 / 40 = 50 W

Power of boy B to carry 20kgs to 10 m  = Work / Time = 2000 / 60 = 33.333333..... W

Since 50 > 33.33333... ,  Boy A has got MORE POWER than Boy B!