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6. A spring of constant of elasticity ke 20000 N/m is on a horizontal frictionless surface and compressed by 5 cm. Upon release the spring pushes on a nearby mass of 0.25 kg. What is the kinetic energy of the mass when the spring is still compressed by 3 cm? a) 50J b) 25J c)9J d) 16J e) it cannot be found since the speed of mass is unknown. 5cm na 3c
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2 -25-9 h5

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