posted by Luricela on .
A 74.0 kg firefighter climbs a flight of stairs 12.0 m high. How much work is required?
W = Mg
M = 74 kg
g = 9.8 m/s^2
W=Force x displacement x cos of the angle.
W=(74 x 9.8)(12)(cos 0)
Ok, i was thinking the similar way but i got confused because there was no time given neither speed.