- #1

annamal

- 381

- 33

- Homework Statement
- We wish to use the energy in a capacitor to accelerate a car of mass 1000 kg from 0-15 km/hr; if the voltage is initially 500 V; what is the area if the dielectric constant = 3.4 and d = 0.0005 inches between the capacitor plates?

- Relevant Equations
- Energy of capacitor = change in kinetic energy

I was wondering why energy of capacitor does not equal change in kinetic energy PLUS change in potential energy where potential energy is the change in the potential energy of the charges. I believe that should be so because energy conservation = change in kinetic energy plus change in potential energy. So why in this problem would we leave potential energy out?