[填空题]
A 280-g wood block is fi2.pb4 nozwb (nfxz6 cgu zf* sm;,b1b+rmly attached to a very light horizonta1 qittg;.g nm;l spring, Fig. 6–40. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this position, how far beyond its equilibrium position will it stret;gngq tti .m1;ch on its first swing? m
