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Ep=0,5 k x²
Ep=0,5x100N/m x (0,1m)²
Ep=0,5 Joule
Em1=Em2
Ep1+Ek1=Ep2+Ek2
0,5J+0=0+Ek2
Ek2=0,5J=0,5mv²
v²=2Ek/m
v = √2Ek/m
v = √2x0,5/1
v = 1 m/s