Randy Cross Quotes

For every action there is an equal and opposite reaction.

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.

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.

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

The slow-motion replay doesn't show how fast the ball was really travelling.

We're used to thinking of force as a stable phenomenon, but it has a cinematic variable, which is acceleration.

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

Momentum solves 80% of your problems.

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

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

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.

Action and reaction are equal and opposite.

My physics teacher, Thomas Miner was particularly gifted. To this day, I remember how he introduced the subject of physics. He told us we were going to learn how to deal with very simple questions such as how a body falls due to the acceleration of gravity.

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.

Newman's first law: It is useless to put on your brakes when you're upside down.

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.

Another mode of accumulating power arises from lifting a weight and then allowing it to fall.

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.

All great results in our universe are founded in motions and forces the most minute.

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.

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 great weight of the ship may indeed prevent her from acquiring her greatest velocity; but when she has attained it, she will advance by her own intrinsic motion, without gaining any new degree of velocity, or lessening what she has acquired.