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# All of Chapter 1 Notes Phy 161

UT

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## Popular in Elementry physics for achitecture and interior design students

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This 6 page Class Notes was uploaded by Chs192 on Thursday September 3, 2015. The Class Notes belongs to Phy 161 at University of Tennessee - Knoxville taught by Dr. Margie Abdelrazek in Summer 2015. Since its upload, it has received 85 views. For similar materials see Elementry physics for achitecture and interior design students in Physics 2 at University of Tennessee - Knoxville.

## Reviews for All of Chapter 1 Notes

Better than the professor's notes. I could actually understand what the heck was going on. Will be back for help in this class.

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Date Created: 09/03/15

The week of Wednesday August 19 2015 Elementary Physics For Architecture and Interior Design majors Chapter 1 notes Basic Math review The most basic trig functions relate the angle and hypotenuse of a triangle The Pythagorean Theorem relates the hypotenuse of a right triangle to its sides legs sine side opposite 9 hypotenuse yr cose side adjacent to 9 hypotenuse xr tane opposite adjacent yx y X X x r cose where 6 is measured relative to x axis y r sine where 6 is measured relative to x axis r2 x2 y2 Pythagorean Theorem Make sure your calculator is set to degree mode unless told othenNise The week of Wednesday August 19 2015 Remember the trig identities are defined relative to the angle that you have chosen You are free to chose an angle but once you do you must define trig relations based on that angle Things to Remember ln 1St quadrant 0900 both cosine and sine are positive x and y In 2nd quadrant 90 180 sine is positive x and y ln 3rd quadrant 180 2700 tangent is positive cosine and sine are negative x and y In 4th quadrant 270 360 cosine is positive x and y The metric units of length mass and time are meter length m kilogram mass kg second time 3 The metric system uses prefixes to designate common multiples in powers often For example millimeter milli is prefix for one thousandth or 10393 meters 0001 m The week of Wednesday August 19 2015 kilometer kilo is prefix for one thousand or 103 meters 1000 m Become familiar with common prefixes such as kilo centi milli micro etc Common conversions for metric and standard units can be found online or given in class as needed Any valid formula in physics should be dimensionally consistent So if we are interested in determining length all terms in the equation should be in units of length For example 3m 4m 11m 18m is dimensionally consistent 9 all units of length 3m 4m 115 IS NOT DIMENSIONALLY CONSISTENT because dimensions are different All the units should be in the same unit system so you cannot add inches to meters and vice versa unless you convert them to the same unit system The week of Wednesday August 19 2015 Suppose a problem has mixed units different unit systems convert all the units back to metric unless othenvise specified If all units are consistent to one system regardless if metric or not there s no need to convert unless specified When measuring a quantity it is only as accurate as the device measuring it ruler stopwatch scale etc There will always be some uncertainty in a measured quantity because measurement devices and humans are not perfect Significant figures sig figs tell you how many numbers in a quantity are CERTAIN For example 213 s 9 three significant digits 2100 m 9 four significant digits The week of Wednesday August 19 2015 Zeroes tell you how many places after decimal point are certain 021 9 two significant digits Zero before decimal is just a placeholder When adding or subtracting numbers with different significant figures the number of significant figures to use for the final answer is determined by the individual terms with the smallest number of significant figures Example 143 15678 1011 401 only three significant figures in answer When multiplying or dividing numbers that have different significant figures always use the least number of significant figures for your final answer The week of Wednesday August 19 2015 205252 39 one two significant figures in answer Overview Be able to solve a set of linear algebraic equations for one or more variables Be able to solve for angles within a variety of geometric situations Be able to manipulate basic trigonometric functions to determine properties of triangles the angle the hypotenuse adjacent side opposite side Be able to convert units if necessary Be familiar with metric units and common prefixes Be able to report a result with the proper significant figures

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