Of all the intellectual hurdles which the human mind has confronted and has overcome in the last fifteen hundred years the one which seems to me to have been the most amazing in character and the most stupendous in the scope of its consequences is the one relating to the problem of motion.
Galileo had already made a significant beginning toward a knowledge of the law of motion. He discovered the law of inertia and the law of bodies falling freely in the gravitational field of the earth.
It's physics. Pure physics, I'm falling fast and faster still. So fall with me. Fall down with me. And stay.
A fall from such a height is rarely straight downwards.
If everything when it occupies an equal space is at rest, and if that which is in locomotion is always occupying such a space at any moment, the flying arrow is therefore motionless.
Principles of motion take precedence over sequence of motion.
Not all speed is movement.
How fast you are moving is more important than where you are.
I like physics. I think it is the best science out of all three of them, because generally it's more useful. You learn about speed and velocity and time, and that's all clever stuff.
What is speed? The sports press often confuses speed with insight. See, if I start running slightly earlier than someone else, I seem faster.
That which is in locomotion must arrive at the half-way stage before it arrives at the goal.
Animation is not the art of drawings that move but the art of movements that are drawn.
Falling is one of the ways of moving.
The Book of the science of Mechanics must precede the Book of useful inventions.
The universe really is motion & nothing else.
So great a contribution to physics was Two New Sciences that scholars have long maintained that the book anticipated Isaac Newton's laws of motion.
Walking is a skill that took millions of years for us to develop... If you wanted to design a robot that could walk as well as a person, this would be fantastically complicated software. It would have to be doing billions of calculations with every step.
The primary and most beautiful of nature's qualities is motion
Acceleration is finite, I think according to some laws of physics.
Your center of mass is a place you cannot visit but you always carry with you. Like memories, it is part of life's baggage.
If your position is everywhere, your momentum is zero.
In order to arrive at knowledge of the motions of birds in the air, it is first necessary to acquire knowledge of the winds, which we will prove by the motions of water in itself, and this knowledge will be a step enabling us to arrive at the knowledge of beings that fly between the air and the wind.
All this, the positive and physical essence of mechanics, which makes its chief and highest interest for a student of nature, is in existing treatises completely buried and concealed beneath a mass of technical considerations.
Returns decrease as motion increases.
Resistance is usually ascribed to bodies at rest, and impulse to those in motion, but motion and rest, as commonly conceived, are only relatively distinguished; nor are those bodies always truly at rest, which commonly are taken to be so.
