Isaac Newton Quotes

Our annual school physics trip was always to Blackpool Pleasure Beach, as it's such a good example of Newtonian physics. You can learn about centrifugal force and Newton's first law from the roller coasters, and the Viking long boat is a giant pendulum. It's good for children to understand that science underpins all these brilliant things.

I shall now recall to mind that the motion of the heavenly bodies is circular, since the motion appropriate to a sphere is rotation in a circle.

There is still some gravity where we are and even as far out as our moon. That is why our moon stays in orbit around the Earth. We don't feel the gravity up here because it is so much smaller than the force we feel when we are on the Earth.

If you're in a helicopter, and you hover, why does the Earth not come to you if it's round?

Impressed force is the action exerted on a body to change its state either of resting or of moving uniformly straight forward.

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.

For relaxation, I like to figure skate. Being on the ice and spinning and jumping, I feel very close to nature. In particular, I feel very close to Newton's laws of motion. On the ice, you can experience Newton's laws of motion in their purest, most elegant form.

The moon gravitates towards the earth and by the force of gravity is continually drawn off from a rectilinear motion and retained in its orbit.

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.

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.

It's not magic! It's physics. The speed of the turn is what keeps you upright. It's like a spinning top.

I have explained the phenomena of the heavens and of our sea by the force of gravity, but I have not yet assigned a cause to gravity.

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

We know there is gravity because apples fall from trees. We can observe gravity in daily life. If we could throw an apple to the edge of the universe, we would observe it accelerating.

Every description of natural processes must be based on ideas which have been introduced and defined by the classical theory.

In order to lift a certain object from the ground, we have to use energy. But then to sustain it at that level, we have to keep on adding energy, or otherwise, the object falls to the ground. It's exactly the same thing with the sound.

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

Only the flowing water is pure and sweet. Only the spinning top and the moving bicycle do not fall over. Rest is not found in irregular and purposeless motion, nor is it stagnation; all real and firm rest is to be sought in harmonious action.

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.

Power exhibits itself under two distinct forms,--strength and force,--each possessing peculiar qualities, and each perfect in its own sphere. Strength is typified by the oak, the rock, the mountain. Force embodies itself in the cataract, the tempest, and the thunder-bolt.

Momentum solves 80% of your problems.

Centripetal force is the force by which bodies are drawn from all sides, are impelled, or in any way tend, toward some point as to a center.

The fact that mankind persists shows that the cohesive force is greater than the disruptive force, centripetal force greater than centrifugal.

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.