Imagine a trampoline. If you put a bowling ball in the middle, the fabric curves. Anything you put on that trampoline will roll toward the ball.

Go to openstax.org → “University Physics Volume 2” → download free PDF → read Chapter 5 (Electric Charges and Fields). That’s your true idiot-proof start.

If you are looking for a PDF to study for an exam, remember the "Chain of Command":

If you need a , see Section 4 below.