The same thing is to be understood of all bodies, revolved in any orbits. They all endeavour to recede from the centres of their orbits, and were it not for the opposition of a contrary force which restrains them to and detains them in their orbits, which I therefore call Centripetal, would fly off in right lines with a uniform motion.
If a projectile were deprived of the force of gravity, it would not be deflected toward the earth but would go off in a straight line into the heavens and do so with uniform motion, provided that the resistance of the air were removed.
The natural law of inertia: Matter will remain at rest or continue in uniform motion in the same straight line unless acted upon by some external force.
Every body continues in its state of rest or uniform motion in a straight line, except insofar as it doesn't.
Impressed force is the action exerted on a body to change its state either of resting or of moving uniformly straight forward.
Every body persists in a state of rest or of uniform motion in a straight line, unless it is compelled to change that state by forces having impact upon it.
How many of you have had a crush on a teacher? I mean, remember that Physics professor? Law One is so steamy, I'm getting worked up just thinking about it: Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. Mee-yow.
Definition of inertia: 'The vis insita, or innate force of matter, is a power of resisting by which every body, as much as in it lies, endeavours to preserve its present state, whether it be of rest or of moving uniformly forward in a straight line.
They were going round and round the island, but they did not meet because all were going at the same rate.
