PHYS208 Fundamentals of Physics II
Hint for Ch. 22, 8P
To have zero net force at 3, we must require that the force from 1 at 3 be equal
and oppositely directed from the force from 2 at 3.
Hint for Ch. 22, 10P
Set the scale with the "characteristic" force of
k q2 / a2 = 0.036 N.
Then consider the three contributing forces scaled appropriately for relative charge and separation.
Hint for Ch. 22, 18P
Remember how to find the value for which a function is maximized.
Hint for Ch. 22, 19P
Like charges repel [Q].
The resultant force of the other two charges [q] must balance it.
Last updated Feb. 17, 1998.
Copyright George Watson, Univ. of Delaware, 1997.