Isaac Newton Quotes

To every action there is always opposed an equal reaction.

An object in motion tends to remain in motion along a straight line unless acted upon by an outside force.

Action and reaction are equal and opposite.

To every action there is always opposed an equal reaction, or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.

Every body continues in its state of rest or uniform motion in a straight line, except insofar as it doesn't.

Acceleration is finite, I think according to some laws of physics.

Momentum,' She repeats. 'You can't just stand there if you want something to fly. You have to run.

Newton's great generalization, which he called the "third law of motion," was that "Action and reaction are always equal to each other;" and that law has been one of the most pregnant of all truths about the mystery of force;--one of the brightest windows through which modern eyes have looked into the world of Nature.

To any action there is always an opposite and equal reaction; in other words, the actions of two bodies upon each other are always equal and always opposite in direction.

Momentum solves 80% of your problems.

I figured it out eventually," she says. She's sitting on the edge of the gurney again; her features slowly materialize as my vision clears. "It's momentum." "What?" I whisper. The feeling returning to my lips, spreading out to my fingertips and toes. "Momentum," she repeats. "You can't just stand there if you want something to fly. You have to run.

Weight, force and casual impulse, together with resistance, are the four external powers in which all the visible actions of mortals have their being and their end.

A moving body whose motion was not retarded by any resisting force would continue to move to all eternity.

The same law takes place in a system, consisting of many bodies, as in one single body, with regard to their persevering in their state of motion or of rest. For the progressive motion, whether of one single body or of a whole system of bodies, is always to be estimated from the motion of the center of gravity.

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.

Though we may never be able to comprehend human life, we know certainly that it is a movement, of whatever nature it be. The existence of movement unavoidably implies a body which is being moved and a force which is moving it. Hence, wherever there is life, there is a mass moved by a force. All mass possesses inertia; all force tends to persist.

The universe is composed of matter, and, as a system, is sustained by motion. Motion is not a property of matter, and without this motion the solar system could not exist.

It is indeed a law of politics as well as of physics, that a body in action must overcome a body at rest.

Any schoolboy could see that man as a force must be measured by motion, from a fixed point.

I am a figure skater, which helps me appreciate Newton's theory of mechanics.

They're hitting harder now more than ever. The only person who would argue that is someone who has never had a physics class. They're faster and stronger, so the reality is the collisions have to be bigger.

But be very, very careful, because when you're playing with momentum, you're playing with fire.

If you move something 10 pounds through space and then stop suddenly, there's a little overshoot. When you transfer weight from one leg to another, there's a certain way that it happens.

Playgrounds are essentially machines to induce Newtonian physics on our own bodies.

In bodies moved, the motion is received, increased, diminished, or lost, according to the relations of the quantity of matter and velocity; each diversity is uniformity, each change is constancy.