The accompanying photo shows a pipevine swallowtail caterpillar climbing up a twig.
(a) As the caterpillar climbs, its potential energy is increasing. What source of energy has been used to effect this change in potential energy?
(b) If the caterpillar is the system, can you predict the sign of q as the caterpillar climbs?
(c) Does the caterpillar do work in climbing the twig? Explain.
(d) Does the amount of work done in climbing a 12-inch section of the twig depend on the speed of the caterpillar's climb?
(e) Does the change in potential energy depend on the caterpillar's speed of climb?