If the maximum length of the spring is 40 cm, what average friction force opposes the motion ofthe mass? A certain spring hanging from the ceiling has a forceconstant k = 50 N/m and a natural length l, = 20 cm. A0.5-kg mass is attached to the spring, and the mass islifted so that the spring is 10 cm long. The mass is thenreleased from rest.10 cm20 cm0.5kg

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If the maximum length of the spring is 40 cm, what average friction force opposes the motion of the mass?

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