Step by step solution, answer is in meters/seconds

A uniform electric field has a magnitude of 2.1E3 Newtons/Coulombs. In a vacuum, a proton begins with a speed of 2.0E4 meters/seconds and moves in the direction of this field. Find the speed of the proton after it has moved a distance of 1.0mm.

Answer in Newtons

An equilateral triangle has sides of 0.12 meters. Charges of -8.6, +8.0 and +1.6 micro Coulombs are located at the corners of the triangle. Find the magnitude of the net electrostatic force exerted on the 1.6 micro Coulomb charge.

answer in meters

Two charges, -18 and +4.0 micro Coulombs, are fixed in place and seperated by 3.0 meters. At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. Let the positive charge be at x=0 and the negative charge be at x=3.0 meters.

answer in horsepower

An electric car accelerates for 8.0 seconds by drawing energy from its 290 V battery pack. During this time, 1280 Coulombs of charge pass through the battery pack. Find the minimum horsepower rating of the car.

Coulomb repulsion and closest approach.

Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 1.5E6 meters/seconds. What is the distance of closest approach?