PRESENTATION OUTLINE
Newton's First Law
Of Motion
What is in motion, stays in motion. What is at rest, stays at rest, unless acted on by an unbalanced force. These rules are known as the principal of inertia.
Inertia is the tendency of an object to resist a change in motion. And an object's mass is a measure of its inertia.
When things go into space, they lose their weight, but not their mass.
When an object is moving through space, the net force is zero so the object will not change its speed or direction. It will stay in motion until another object stops it.
When a pool stick is pushed against the cue ball, the cue ball is set in motion. The cue ball will keep rolling until it hits the colored balls and friction slows it down.
