Na nieruchome ciało zaczyna działać siła rosnąca liniowo w czasie (patrz wykres)
Oblicz zmianę pędu tego ciała
dane:
F1 = 5 N = 5 kg*m/s2
t1 = 10 s
F2 = 10 N = 10 kg*m/s2
t2 = 20 s
szukane:
dp = ?
dp = p2-p1 = F2 *t2 - F1 *t1
dp = 10 kg*m/s2 *20s - 5 kg*m/s2 *10s = 200 kg*m/s - 50 kg*m/s
dp = 150 kg*m/s
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dane:
F1 = 5 N = 5 kg*m/s2
t1 = 10 s
F2 = 10 N = 10 kg*m/s2
t2 = 20 s
szukane:
dp = ?
dp = p2-p1 = F2 *t2 - F1 *t1
dp = 10 kg*m/s2 *20s - 5 kg*m/s2 *10s = 200 kg*m/s - 50 kg*m/s
dp = 150 kg*m/s
==============