Skills for analyzing processes involving electric force and electric potential energ...

Skills for analyzing processes involving electric force and electric potential energy

Evaluate the solution A student was given the following problem: A 0.20-kg cannonball with a +1.0 X 10^-4 C charge starts at rest 0.40 m from a fixed +2.0 X 10^-4 C charge. When the cannonball is released, it flies vertically upward. How fast is it moving when 10 m above the fixed charge? The student gave this solution:

or v_y = 15 m/s. Evaluate the solution to this problem and correct any errors you find.