Unformatted text preview: (e) Is the equilibrium stable or unstable? 2. Consider a thin uniform disk of mass M and radius a . Find the force on a mass m located along the axis of the disk directly by integrating the force equation d F =Gm dM r 2 ˆ r (2) Hint: . Use the symmetry of the problem so that you only need to consider the “vertical” (onaxis) component of d F acting on m . 3. Using Gauss’ law, calculate the gravitational ﬁeld g at a distance r from an inﬁnitely long cylindrical rod of mass density σ per unit length. 1...
View
Full Document
 Spring '10
 RogerMelko
 Energy, Force, Potential Energy, Fundamental physics concepts

Click to edit the document details