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. Add vectorially!

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.


"http://www.physics.udel.edu/~watson/phys208/exercises/hints/0211.html"
Last updated Feb. 17, 1998.
Copyright George Watson, Univ. of Delaware, 1997.