Odpowiedzi

2010-01-05T18:41:04+01:00
W = F × s
F = m × g

s = 9m
W = 300J
g = 10m/s²

F = W ÷ s
m × g = w ÷ s /:g
m = w ÷ s ÷ g
m = 300J ÷ 9m ÷ 10m/s²
m = 3,3 kg