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Cornell Notes Light Matter M2

By Mitch-Alves Apr 28, 2015 294 Words
Cornell Notes

Light & Matter
Force and Motion – M2

KEY POINTS
Force and
Motion

Force:
Distance

Newton:
First Law

Newton:
Second Law

Newton:
Third Law

Newton:
Gravity Law

NOTES
When an object changes its position in respect to a point and time, that’s motion. Force is what changes the motion of an object with mass and modifies its velocity.

Note that force can act at a distance. Magnetism is a type of non-contact force. Friction in the other hand only operates in contact of objects, those are called contact forces.

An object initially at rest is predicted to remain at rest if the total force acting on it is zero, and an object in motion remains in motion with the same velocity in the same direction.

The force needed to accelerate an object equals the mass of the object multiplied by its acceleration. Best known as Force = Mass x Acceleration

"For every action there is an equal and opposite reaction. To understand this law you must understand action-reaction pairs.

"For every action there is an equal and opposite reaction. To understand this law you must understand action-reaction pairs.
OBSERVATIONS
The motion of an object can be described by its speed, direction, and motion. Note that an object that no force is applied to, will continue to move at a constant speed straight. If multiple forces act upon an object within a straight line, then the forces will reinforce or cancel one another depending of factors such as magnitude and direction. Unbalanced forces will cause changes in the direction or speed of an object. Electromagnetism is composed of magnetic fields and electric currents. The electromagnetic spectrum is mediated by a particle called photon. Example: heat, visible light, radio waves, X-rays, UV radiation.

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