The first figure gives spring force F, versus position x for the spring-block arrangement of the second figure. The scale is set by F= 200 N. We release the block at x = 14.0 cm. How much work does the spring do on the block when the block moves from x; = +9.0 cm to (a) x = +7.0 cm, (b) x = -7.0 cm, (c) x = -9.0 cm, and (d) x = -10.0 cm? -10 x=0 F-0 mooooooo x positive F, negative (a) (b) 7 -x (cm) -Block attached to spring

The first figure gives spring force F, versus position x for the spring-block arrangement of the second figure. The scale is set by F= 200 N. We release the block at x = 14.0 cm. How much work does the spring do on the block when the block moves from x; = +9.0 cm to (a) x = +7.0 cm, (b) x = -7.0 cm, (c) x = -9.0 cm, and (d) x = -10.0 cm? -10 x=0 F-0 mooooooo x positive F, negative (a) (b) 7 -x (cm) -Block attached to spring