Isaac Newton

Scientists

The prism experiment.

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Physics

Isaac Newton

Newtons Laws of Motion

Mass and acceleration. Force = mass x acceleration

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Astronomy

Planetary Science

Isaac Newton

Yes, it was Sir Isaac Newton, during the year 1666 when, according to his journals, an apple fell on his head while he was sitting under a tree.

Newton's major contribution was to describe gravity as an inverse-square law and he produced a formula that allows the force between two bodies to be calculated if the distance and the two masses are known. It was already known that an inverse-square law explained the elliptical orbits of the planets, but Newton's improvement allowed the masses of the planets to be calculated.

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Physics

Isaac Newton

Newtons Laws of Motion

It means there is no net force acting on it.

A plane in the air has no acceleration, but it does have forces acting on it.

Lift pushes it up

Gravity pushes it down

Air resistance opposes its movement

Thrust provides movement

When all these forces are equal the plane will move at a constant velocity. If one of these forces becomes greater the NET force on the plane will no longer be 0 and there will be an acceleration or deceleration.

Hope that helps.

Another example would be space as there are no opposing forces, if in space once a speed was that speed would be constant until you 1.) decelerated with a force in the opposite direction 2.) accelerated the speed past your current velocity in your current direction 3.) Get caught by some planets gravity and crash to you death (but then this question is the least of your problems)

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Science

Physics

Isaac Newton

It takes every human being on the planet to force the mass of your body to accelerate.

A total force of 2 Newtons on a mass of 3 Kg would cause the mass to accelerate at 6 metres/sec2. Note that the acceleration is caused by the sum of all forces, so if the mass is glued to a table top there is a resisting force which causes the net force to be zero. (or you might move the table too, but then you have a different total mass then, and friction on the floor resisting motion too).

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Physics

Isaac Newton

Newtons Laws of Motion

F = M A

A = F / M = 180/60 = 3 meters per second2

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Math and Arithmetic

Isaac Newton

Newtons cradle

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Physics

History of Science

Isaac Newton

Newton's Law of Gravity is not wrong, in macroscopic scale and at relatively low speed, it predicts the movement of objects accurately.

However, objects at microscopic scale near the speed of light will have to take into account time dilation, and General Relativity helps describes these.

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Physics

Isaac Newton

Inertia is matter's unwillingness to slow down, speed up, or change direction in any way. It is also related to the matter's momentum. Momentum is caused by the body's velocity as well as the body's direction. If the velocity of the matter is increasing, or the body changes its direction, it can be said that the body of mass is experiencing inertia.

When the body is accelerating (changing in velocity), the momentum of the matter is also changing (F=ma), thus mass and acceleration is related by momentum through inertia.

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Isaac Newton

Thomas Edison

Marie Curie

No, Thomas invented the light bulb

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Science

Isaac Newton

No force is required for an object to move with constant velocity, but you need a force to accelerate an object (make velocity increase or decrease).

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Physics

Isaac Newton

Newtons Laws of Motion

The larger the objects mass the larger the inertia and also the gravitational force.

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Isaac Newton

no i dont reckon so.

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Isaac Newton

Newtons Laws of Motion

the first law is:

An object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force

so all of them.

-in golf, the golf ball will move when hit and stop only when gravity and friction make it happen.

in this case the ball is at rest on the tee and will not move until struck by the club (acting as ouside force 1), at which poin it then flies out until the friction of the air and gravity's pull force it back down to the earth, at which point friction with the ground is then added which all conspire to slow the ball to a stop.

-in foot ball, the players run with the ball until tackled by another player.

in this case the two players are the opposing forces

-in baseball the ball is thrown is moves toward the catcher until either the bat strickes it and it is sent elsewhere, or the catcher catches it and throws it back to the pitcher.

in this case the ball is the object and the bat and pitcher are the outside forces acting on the ball to give it motion.

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Isaac Newton

i don't know yall won't tell me

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Math and Arithmetic

Isaac Newton

Mathematicians

He discovered gravity when an apple fell on his big forehead. He discovered that the same force acts between the Sun and the planets to make them move in stable elliptical orbits. To do that he had to invent the laws of motion and also the differential calculus. Quite a feat that no-one else had managed, even after 1500 years of thinking (he died while thinking) about how the planets moved around.

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Science

Physics

Isaac Newton

yes

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Science

Physics

Isaac Newton

foe

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Science

Chemistry

Isaac Newton

How about three. His three laws of motion. (Taken from Wikipedia)

- First Law: Every body remains in a state of rest or uniform motion (constant velocity) unless it is acted upon by an external unbalanced force. This means that in the absence of a non-zero net force, the center of mass of a body either remains at rest, or moves at a constant speed in a straight line.
- Second Law: A body of mass m subject to a force F undergoes an acceleration a that has the same direction as the force and a magnitude that is directly proportional to the force and inversely proportional to the mass, i.e., F = ma. Alternatively, the total force applied on a body is equal to the time derivative of linear momentum of the body.
- Third Law: The mutual forces of action and reaction between two bodies are equal, opposite and collinear. This means that whenever a first body exerts a force F on a second body, the second body exerts a force −F on the first body. F and −F are equal in magnitude and opposite in direction. This law is sometimes referred to as the action-reaction law, with F called the "action" and −F the "reaction".

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Math and Arithmetic

Isaac Newton

The Difference Between

The newton comes from the MKS (kg-m-s) system

The dyne comes from the CGS (cm-g-s) system.

This means that:

1N=1 kg*m/s²

1dyn=1 g*cm/s²

And therefore that

1N=10^5 dyn

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History, Politics & Society

Physics

Geometry

Isaac Newton

Joule

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Isaac Newton

Scientists

Gravity

yepp

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Physics

Isaac Newton

Newtons Laws of Motion

F=ma

a=F/m

a=7500/1500

a=5m/s^2

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Isaac Newton

Mathematicians

He discovered gravitational force and established the three Universal Laws of Motion.

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Math and Arithmetic

Physics

Isaac Newton

example for law of inertia - in moving car when the brakes are applied all of sudden the passengers lean forward because the brakes are applied on moving car and not on bodies of passengers. So bodies keep moving while the car retards.

example for law of acceleration - to move a standing object we need to apply force and to stop a moving object we need to apply brakes - this is law of acceleration.

law of interaction - when the horse pulls a cart, the cart pulls back the horse or when you hit a wall you get hurt as wall also hits you back.

Answer

It is quite simple, that is everything contains enertia i.e the reluctance to change what it is doing. The first answer is a good example. Both car and passengers travel at 40 kl per hr. The car breaks but the passengers still wish to move with a forward motion of 40 kl per hr.

The third answer is not quite correct. As the horses collar is attached to the cart therefore becomming part of it, the horse pushes the cart.

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