A rubber balloon gains excess electrons when a strange physics professor rubs the balloon in his hair. If your strange physics professor decided to do this, answer the following questions about the charged balloon. (a) If the professor holds the balloon 12 mm in front of a wall (assume that the wall has neutral charge), will the charges on the wall be affected by the balloon. Briefly explain if and how the wall will respond to the charged balloon. Be sure to use language from class and diagrams when necessary.
(b) If the balloon is allowed to come into contact with the wall, it will stick to the wall. In one sentence, tell me why the balloon sticks to the wall. Please draw a free body diagram of the balloon as it sticks, stationary, to the wall.
(c) Determine an expression for the coefficient of static friction between the bal- loon and the wall. Recall: fs=u. N. Your expression should be in terms of m, g, k, q, and d; where: m is mass, g is the constant associated with the acceleration due to gravity, q is charge, and d is the distance between the balloon and the wall.
(d) (EC) If us 0.81, m = 7.5g and q = 7nC, determine the actual distance between the balloon and the wall, when the balloon is "touching" the wall.. =