2.0-kg block slides along a horizontal surface with
Chapter 8, Problem 8.43(choose chapter or problem)
2.0-kg block slides along a horizontal surface with acoefficient of kinetic friction fjLk = 0.30. The block has aspeed v = 1.3 m/s when it strikes a massless spring head-on(as in Fig. 8-18). (a) If the spring has force constantk = 120 N/m, how far is the spring compressed? (b) Whatminimum value of the coefficient of static friction, /jls , willassure that the spring remains compressed at the maximumcompressed position? (c) If /jls is less than this, what is thespeed of the block when it detaches from the decompressingspring? [Hint. Detachment occurs when the spring reachesits natural length (x = 0); explain why.]
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