[填空题]
A 280-g wood block is firmly attached to a very light horizontal spring, a(3)dv l5psp5,ief5c btpia)Fig. 6–d) l)b 55fvp5p3a eiai(cps,t b39f-e jkg.sq40. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the springqe9 3gjf. -kbs 18 cm. If the spring is released from this position, how far beyond its equilibrium position will it stretch on its first swing? m
