Question

m1 is a stationary sphere with charge q1.m2 is suspended from the ceiling by a string and has charge q2.m1 and m2 are conducting spheres of the same size but varying masses. q1 and q2 have the same sign.

from the combinations below, rank the angle the string will form with the vertical from highest to lowest value

A) m1=1,q1=1
m2=1,q2=1
B) m1=2,q1=1
m2=1,q2=2
C) m1=1,q1=2
m2=1,q2=2
D)m1=2,q1=1
m2=2,q2=1
E=m1=1,q1=2
m2=2,q2=2
F=m1=1,q1=1
m2=1,q2=2

or, all of the angles are same

Please carefully expalin your reasoning.

Answer 1

F = k q Q / r^2

a = F/m

angle will be roughly proportional to a/g the ratio vs. gravity

You won't need k to order these.