[填空题]
A 0.620-kg wood block is firmly attached tk*b xp85-uspxo a very light horizontal ,exh,rg72blh k/zo; 8wkrw) o spring (k=180N/m) as shown in Fig. 6–40. It is noted that the block–spring system, wh r)x8e,2 w/o7rzbhkw;o ghkl,en compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the coefficient of kinetic friction between the block and the table?
