Odpowiedzi

2009-11-16T17:45:52+01:00
W = Fs = mgs
W = 6,5kg * 10N/kg * 0,8m = 52 (J)
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2009-11-16T17:46:02+01:00
W=F*S
F=ma=mg
F=6,5kg*10m/s²=65N
W=65N*0,8m=52J
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