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# Applied Physics

TermDefinition
What is speed? A measure of how fast something is moving.
How would you measure speed?
What is acceleration? The rate at which velocity is changing.
What is a vector? An arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity.
What is a scalar? A quantity in physics, such as mass, volume, and time, that can be completely specified by its magnitude, and has no direction.
What is Newton's First Law? When an object is in motion, it stays in motion. When an object is at rest, it stays at rest.
What is inertia? The reluctance of any body to change its state of motion. Mass is the measure of inertia.
Newton's Second Law The acceleration produced by a net force on a body is directly proportional to the magnitude of the net force, is in the same direction as the net force and its inversely proportional to the mass of the body.
What is the relationship between acceleration and force? Ex. Apply force to a hockey puck that was at rest, it starts to move. Since it wasn't moving before, it has accelerated - it has changed its motion. When the stick is no longer moving it, the puck is at a constant velocity.
What is the relationship between acceleration and force (continued)? Apply more force to the puck, the motion changes again. The puck accelerated. Force causes acceleration.
What is momentum? Inertia in motion, or, the mass of an object multiplied by its velocity.
What has momentum? Anything that moves at great force (ex. a moving train).
What is impulse? A measure of force and time.
What is the relationship between momentum and impulse? The greater the impulse exerted on something, the greater will be the change in momentum.
What is kinetic energy? Energy in motion. Equal (nonrealtivitiscally) to half the mass multiplied by the speed squared.
What is potential energy? Energy of position, usually related to the relative position of two things, such as stone and Earth, electron and a nucleus; stored and held in readiness.
What is a situation where one type of energy turns into the other? As you draw back a stone in slingshot, you do work stretching the rubber band. The rubber band then has potential energy. When released, the stone has kinetic energy equal to the potential.
Where does charge come from in an electric circuit to light a light bulb? Battery pushes the charge, carried through wires, then works when it touches something metal.
Transverse Wave Medium of the waves moves perpendicular to another wave.
Longitudinal Wave Medium of the waves moves parallel to another wave.
Frequency How many waves go by in a second.
Constructive Interference? Crest of a wave moves through another crest.
Destructive Interference Crest of a wave moves through a trough.
Crest Highest point of a wave.
Trough Lowest point of a wave.
Standing Wave Two waves of the same amplitude and wavelength to make areas that move a lot.
Created by: Blissful_Olive