Which of these is a good example of Newton's First Law of inertia A) a ball sits motionless on the ground B) a ball gathers speed as it rolls downhill C) a ball accelerates as it falls out of the classroom window Eliminate D) a ball slows down after it is kicked through the grass

I'm quiet sure, but I think the answer to this question is C) A ball accelerates as it falls out of the classroom window.

Definition of Inertia: Inertia is the resistance of any physical object to any change in its state of motion (this includes changes to its speed, direction or state of rest). It is the tendency of objects to keep moving in a straight line at constant velocity.