Question

What kind of motion indicates a system where the net force equals zero?

A. only accelerating objects
B. only stationary objects
C. both accelerating and stationary objects
D. only objects moving with a constant positive velocity
E. stationary objects as well as objects moving with a constant velocity

Answer 1

The answer would be E. I am sure of it because it was on one of my assignments in Physics.

Answer 2

The net force is zero on any object that's not accelerating ... the speed and direction of its motion aren't changing.

That's true of any object that's moving in a straight line with constant speed, or else not moving at all.

So the correct choice is E .