Odpowiedzi

2010-03-30T20:26:38+02:00
M= ?
g≈ 10
h= 0,8
ep= 120 j

ep= m*g*h
ep/ g*h = m
120 / 10*0.8 = m
120 / 8=m
15=m

spr. EP= 15*10*0,8
EP= 120
2010-03-30T20:29:32+02:00
Ep=120J Ep=mgh
h=80cm=0,8m m=Ep/gh
g=10m/s(kwadrat)


m=120/0,8*10 [kg]
m=120/8
m=15 [kg]



Pozdrawiam :P