What happens when a negatively charged object a is brought near a neutral object b? a. object b gets a negative charge. b. object b gets a positive charge. c. object b stays neutral but becomes polarized. d. object a gets a positive charge. e. object a loses all its charge.

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.