Physics Hw Problem 2

# Physics Hw Problem 2 - Andy Gawne PHYS-0133-51 Problem...

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Andy Gawne PHYS-0133-51 Problem 29.48 Problem: A proton is fired with a speed of 200,000 m/s from the midpoint of the capacitor toward the positive plate. Show that this is insufficient speed to reach the positive plate. What is the proton's speed as it collides with the negative plate? Visualize: Model: We can assume that all energy is conserved. Since no energy is lost to the surroundings, all of the kinetic energy is going to be converted into potential energy. Since the proton is located directly in the middle of the two plates, the initial electric potential is half the difference between the two plates. Solve: a) Assuming that at the starting point, all of the proton's energy is kinetic, and that if the proton reaches the positive plate, all of the kinetic energy is converted into potential energy when the proton's speed equals zero. Also, since the initial potential energy is zero, then the change in voltage from the starting point to the plate is 250 volts.

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