40. A fly buzzes four and a half times around Kit Yan's head. The fly ends up on the opposite side from where it started. If the diameter of his head is 14 cm, what is the total distance the fly travels and its total displacement? a. The distance is 63pi cm with a displacement of zero.
b. The distance is 7 cm with a displacement of zero.
c. The distance is 63pi cm with a displacement of 14 cm.
d. The distance is 7 cm with a displacement of 63pi cm.

A fly is sitting at the midpoint of a wooden chord of a circular wheel. The wheel has a radius of 10cm and the chord has a length of12cm a How far from the hub (center) is the fly? b The wheel is spun. What is the path of the fly?

Explanation:

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.