Why is the following situation impossible? You set up an apparatus in your labor

Question

Why is the following situation impossible? You set up an apparatus in your laboratory as follows. The x axis is the symmetry axis of a stationary, uniformly charged ring of radius R = 0.500 m and charge Q = 50.0 C. You place a particle with charge Q = 50.0 C and mass m = 0.100 kg at the center of the ring and arrange for it to be constrained to move only along the x axis. When it is displaced slightly, the particle is repelled by the ring and accelerates along the x axis. The particle moves faster than you expected and strikes the opposite wall of your laboratory at 40.0 m/s.

Explanation / Answer

Inital potential E: U = kQq/r (just after equilibrium point) so U = (9x10^9)*(2500x10^-12)/(0.5) = 45 J

Final kenetic E: K = 1/2mV^2 = 1/2*(0.1)*(40)^2 = 80 J

Final kenetic cannot exceed initial potential. That doesn't make sense...

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.