Energy = mgh
h=difference in elevations between floors.
The number of steps is irrelevant because it's the total difference in elevations that counts.
If m is in kg, g in m/s², and h in metres, the result mgh is in joules.
A worker has to move a rock with mass 50 kg on a stairway from the first floor to the second floor of a house. The second floor is 4.6 m above the first floor and the stairway has 18 steps. The rock is lifted from step to step. How much energy (in Joule) has to be spend to move the rock up the stairway.
1 answer
1 answer