[填空题]
A 280-g wood block is firmly attxe i8etlcvi.vnz iq;k+.0 7o+ached to a very9q2txw su(ru ( light horizontal spring, Fig. 6–40. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N c x(92rtuw(uqsompresses the spring 18 cm. If the spring is released from this position, how far beyond its equilibrium position will it stretch on its first swing? m
