if two friends Ram and Shyam each having a weight of 40kg,go for rock climbing. Ram climbs to a hieght of 3m in 10s and Shyam covers the same height in 12s. Then what is the work done by both of the friends?
Please note that it is only the formula of work done which is most important to be able to solve these kind of questions.
W = F . d
As the only force they have to overcome is gravitational force
F = mg
m is the same for both (40 kg) so the value of F will be same too.
Now, the height covered (12m) is same for both too.
Hence, W = 40 kg x g x 12 m will be the same for both the boys.