Odpowiedzi

2009-12-15T19:33:22+01:00
zmala 4 razy.

Ek = m * V^2 / 2

V1 = 60
V2 = 30 = 1/2 V1

Ek2 = m * (1/2V1)^2/2 = m*1/4*V1^2/2 = 1/4 Ek1
4 2 4