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k = 100 N/m
x = 5 cm = 0,05 m
Szukane:
W=?
Eps = k * x² * ½ = W
W = 100 * 0,05 m² * ½
W = 100 * 0,0025 * ½
W = 0,125
Sprawdzamy jednostki:
kg * m²/s² = N*m = J
W = 0,125 J
Trzeba wykonać pracę 0,125 J