How Does Human Power Relate to Acceleration in Lifting 40kg Up 36m?

[Phadgebar]

about human power??

consider the worker needs to bring up 40kg, the floor is about 36m so the work done is
w = (40kg) (10m/s^2) (36m)
w = 14 400J

i don't know what's the (10m/s^2) for??

 

[Lsos]

Work is force times distance. If you only use 40kg x 36m, you're multiplying mass times distance.

Mass and force are two different concepts. You need gravity in order for mass to have a force. In order to figure out how much force that mass is applying, you need to multiply it by the acceleration due gravity, which in any case on the planet Earth is close to 10m/s^2...although closer to 9.81, which is what we typically use.

 

[russ_watters]

f=ma