Fa05-MT2-Luk-Soln - Solution to Midterm II Problem 1 Part(a Our two spheres have the same charge on them What this means is that they will

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Solution to Midterm II Problem 1 Part (a) Our two spheres have the same charge on them. What this means is that they will experience a repulsive force between them. Eventually these two spheres will reach static equilibrium at some angle from the vertical. This situation is depicted graphically below. L l L m,q m,q θ F F F T el g θ Our condition for static equilibrium is that the sum of the forces in both the horizontal and the vertical direction must be zero. Σ F x = 0 and Σ F y = 0 To apply these to our problem consider a free body diagram for one of the spheres. As we can see in the diagram we have three forces acting on each of the spheres. One is the gravitational force pointing down, one is the electric force felt because the two charges are near each other, and the last is the tension in the string. We introduce the angle θ to be the angle between the vertical and the string. We can see then that our equilibrium conditions now read: F T cos θ = F g = mg and F T sin θ = F el...
View Full Document

This note was uploaded on 02/04/2010 for the course PHYSICS 7B taught by Professor Packard during the Spring '08 term at University of California, Berkeley.

Page1 / 11

Fa05-MT2-Luk-Soln - Solution to Midterm II Problem 1 Part(a Our two spheres have the same charge on them What this means is that they will

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online