A labourer whose own mass is 50 kg carries a load of an additional 60 kg on his
head to the top of a building 15 m high. Find the total work done by him. Also find
the work done by him if he carries another additional block of mass 10 kg to the
same height. (take g = 10 m/s2)
m = 60 + 50 = 110 kg
s = 15 m
a = g = 10 m/s2
F = m * a = 110 * 10 = 1100 N
W = F * s = 1100 * 15 = 16500 J
m = 60 + 50 + 10 = 120 kg
s = 15 m
a = g = 10 m/s2
F = m * a = 120 * 10 = 1200 N
W = F * s = 1200 * 15 = 18000 J
s = 15 m
a = g = 10 m/s2
F = m * a = 110 * 10 = 1100 N
W = F * s = 1100 * 15 = 16500 J
m = 60 + 50 + 10 = 120 kg
s = 15 m
a = g = 10 m/s2
F = m * a = 120 * 10 = 1200 N
W = F * s = 1200 * 15 = 18000 J