[填空题]
A 0.620-kg wood block is firmly attached to a very 4 q/0s0 nd zhp)ob,tollight horizontal zifk/02s7v mm( bsdm5 spring (k=180N/m) as shown in Fig. 6–40. It is noted that the block–spring system, when 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 fric(0mi 7zmk 5bm vss/fd2tion between the block and the table?
