Problem 11-35 Potential and kinematics - Part 5B - C

A proton is accelerated from rest from a positively charged plate to a parallel negatively charged plate. The separation of the plates is \(8.9\; mm.\) If the potential difference between the plates is \(75.3\; V,\) what is the speed of the proton just as it hits the negative plate?
[Ans. \(1.2 \times 10^5\; m/s\)]


Accumulated Solution

Proton diagram B

\(U = qV \\ E_{K1} + U_1 = E_{K2} + U_2\)


No. If the \(KE\) has been increasing and the total energy is conserved will the value of \(U_2\) be

Higher

or

Lower

than the value of \(U_1\)?