Odpowiedzi

2009-09-16T16:10:02+02:00
F = ma
F = m * Δv/Δt
F = 20 kg * 3 m/s /5s
F= 12 N
2009-09-16T16:19:37+02:00
F = m*a
F = m * Δv/Δt
F = 20 kg * 3m/s / 5 s
F = 4 * 3 kg/m
F = 12 N