Newton's Laws of Motion

push or pull

required to change an object’s motion.

Force

show magnitude and direction

Vector

What are the Four Forces known in the Universe?

Electromagnetic, Strong Nuclear, Gravitation, Weak Nuclear

caused from electric and magnetic interactions

Electromagnetic

Responsible for holding nucleus together in the atom; strongest force; acts over the shortest distance

Strong Nuclear

weakest force; acts over the longest distance

Gravitation

Responsible for radioactivity in atoms

Weak Nuclear

What are the 2 types of Force?

Contact and Field

Exists when an object from the external world touches a system and exerts a force on it

Contact Force

An object can move without something directly touching it

Field Force

measurement of how difficult it is to change the objects velocity

Mass

resistance to change in velocity

Inertia

What Law is this?
An object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an unbalanced force.

Newton’s First Law of Motion

What Law is this?
Force equals mass times acceleration (F = ma).

Newton’s Second Law of Motion

What Law is this?
For every action there is an equal and opposite reaction.

Newton’s Third Law of Motion

This Law states that all objects have inertia. The more mass an object has, the more inertia it has (and the harder it is to change its motion).

Newton’s First Law of Motion

a measurement of how quickly an object is changing speed.

Acceleration

causes something to accelerate.

Unbalanced Force

The sum total and direction of all forces acting on the object.

Net Force

is the quantity of matter in an object. More specifically, it is a measure of the inertia, or “laziness,” that an object exhibits in response to any effort made to start it, stop it, or otherwise change its state of motion.

Mass

is the force of gravity on an object.

Weight

Formula for Tension

T= mg+ma

Things that are in balance with one another

Equilibrium

is a state wherein no physical changes occur.

Mechanical Equilibrium

Whenever the net force on an object is zero, the object is in mechanical equilibrium—this is known as the

Equilibrium rule

To find the force necessary to put something in equilibrium, first find the

Resultant

The force necessary to put something in equilibrium is called the

Equilibriant Force