PHYS 141 Study Guide - Comprehensive Final Exam Guide - Pythagorean Theorem, Cartesian Coordinate System, Trigonometric Functions
21 Nov 2018
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Document Summary
Introduction: standards of length, mass, and time, provide bedrock of accuracy for descriptions of physical world. Old: distance between two lines on a specific bar of platinum-iridium alloy. New: distance travelled by light in 3. 3*10-9 s aka 3. 3 ns. The mass of a specific platinum-iridium alloy cylinder. How long will it take for the fish to reach the surface: start by drawing diagram. 2. 1 displacement: frame of reference: coordinate system that defines starting point for measurement, displacement x of an object is its change in position. Instantaneous velocity v is the limit of the average velocity as t approaches zero: v=lim t 0 x t. V t=v v t t: si unit: m/s2, a=lim t 0 v t, can be determined for a given time on a position vs. time graph by the slope of the line tangent to the curve. Instantaneous speed of an object is a scalar quantity and is equal to magnitude of the instantaneous velocity.
