Physics homework help

Question

Two identical point charges (q=+9.80 x 10^-6 C) are fixed at opposite corners of a square whose sides have a length of 0.450 m. A test charge (q0= -7.90 x 10^-8 C), with a mass of 8.40 x 10^-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of the square.

Answer 1

Hi Erin,

This question is very similar to the other question that I “answered “. Think about energy in this situation. The total mechanical energy (ie ME = KE + PE ) is conserved. The trick will be to find the initial potential and final potential of the system. If you can determine the work done to assemble the initial and final configuration you will then have the potential energies that you need. Note that the work done to bring in a charge is W= q (delta V). I hope this helps. If not reply to this and I can give you further guidance.