15 terms

# Honors Physics Chpt. 1 Definitions

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Time
Interval between 2 events. Measure of a duration.
Time Interval: Difference between 2 clock times.
Mass
Amount of matter present in an object. Fundamental quantity. SI unit is Kg.
Length
The amount of 1 dimensional space between 2 real numbers. Usually used for horizontal small distances.
Temperature
Measurement of the average KE molecules in a system. Measured with a thermometer.
Distance
Similar to length. Usually used to describe great length. Always used in physics labs when describing motion.
Speed
How fast an object travels. Rate of change of distance.
Acceleration
Rate of change of speed or velocity. Faster/slower. Speed - positive or negative sign indicates speeding up or slowing down.
Force
Push or a pull. A force that causes an object to undergo a change in motion. Described in the 2nd law.
Pressure
Force applied/ area of application units = n/m2(squared) = pascals
Density
The mass per unit volume of a substance. Mass/volume. Units = kg/m3(cubed). Used for identification.
Inertia
Resistance to change used in first law. Either applies to objects at rest (remaining at rest) or moving uniformly (constant speed, unchanging duration). It is proportional to an object's mass.
Energy
The capacity to do work or transfer heat. 2 classes of energy: potential and kinetic. The forms of energy fall into any of these classes: heat, electrical, KE motion, sound KE, chemical nuclear magnetism, PE of position.
Heat
Form of energy that "flows" between 2 samples of matter due to their difference in temperature.
Scalar
Quantity with size units but no direction. Fundametal Qualities are: scales, temperature, time, length, and mass.
Vector
Quantity with size units and direction. Denoted by arrow over variable symbol. Examples: velocity, displacement, acceleration, and momentum.