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### 341 Cards in this Set

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 T or F the IS of units provides units of measurements for all purposes true What is the basic unit of length? m NAME its basic unit is m length NAME m = meters What is the symbol for meters? m What is the basic unit for mass? kg NAME its basic unit is kg mass What does kg stand for? kilogram What is the symbol for kilogram? kg What is the basic unit of time? s NAME its basic untit is s time What is the basic unit of electric current? A NAME its basic unit is A electric current What does A stand for? ampere What is the symbol for A? ampere What is a mole? is the amount of a substance NAME this refers to the amount of a substance mole What is the symbol for mole? mol What does mol stand fro? mol What does K stand for? Kelvin What is the symbol for K? kelvin What is the base unit of thermodynamic temperature? K NAME is base unit is K thermodyanmic temperature What does the symbol cd stand for? candela What is the symbol for candela? cd What is the base unit of luminous intensity? cd NAME its base unit is cd luminous intensity How do u find speed? distance/ divided by time NAME you find this by distance/time speed what is the base unit of speed? m/s NAME its base unit is m/s speed How do u find density? mass/vol NAME you can find this by mass/vol density What is the base unit for density? kg/m3 NAME its base unit is kg/m3 density What is G's prefix? giga NAME its prefix is giga G What is the prefix for M? mega NAME its prefix is mega M What is the prefix for k? kilo NAME its prefix is kilo k What is the prefix for m? milli NAME its prefix is milli m What is the prefix for u? micro NAME its prefix is u micro What is the prefix for n? nano NAME its prefix is nano n What value does G have? 10^+9 NAME this has a value of 10^+9 G What value does M have? 10^+6 NAME this has a value of 10^+6 M What value does k? 10^+3 NAME this has a value of 10^+3 k What value does m? 10^-3 NAME this has a value of 10^-3 m What value does u have? 10^-6 NAME this has a value of 10^-6 u What value does n have? 10^-9 NAME this has a value of 10^-9 n 1 m = (1) 100 cm 1 (1)= 100 cm m NAME this is the science of matter and interactions physics NAME are influences that act btwn things interactions Where does the word physics come from? the greek word physis for nature NAME this comes from the greek word physis for nature physics What do physicists want to do? know how nature works T or F physics can be done w out mathmatics false What are (3) steps to doing physics? (1)seek simplicity (2)do experiments (3)use math What do interactions involve? (4) (1)forces (2)feilds (3)energy (4)momentum What are the (5) great theories? (1)classical mechanics (2)thermodynamics (3)electromagnistm (4)theory of relativity (5)quantum mehcanics NAME these include classical mechanics, thermodynamics, electromangistm, theory of reativity and quanntum mechanics the great theories of physics What is the theory of classical mechanics? is a theory on motion and gravitation NAME this is a theory on motion and gravitation theory of classical mechanics What is the theory of thermodynamics? is a theory of thermal phenomena NAME this is a theory of thermal phenomena themodynamics What is the theory of electromagentism? is a electromagentic field theory NAME this is a electromagenitic field theory electromagentism What is the theory of relativity? is a theory of feilds in space time NAME this is a theory of feilds and space-time theory of relativity What is the theory of quantum mechanics? is the theory of fundamental processes NAME this is a theory of fundamental processes quantum mechanics NAME plays a role in astronomy, biology, chemistry, and the earth sciences physics NAME this provides support for the other natural sciences physics What is kinematics? is the mathamatical description of motion NAME this is the mathmatical description of motion kinematics What is the word dynamics used for ? to explain why a motion occurs x(t) can also refer to (1) the x axis (1) can also refer to the x axis x(t) What does x(t)indicate? the postion of something moving in time NAME this indiactes the postion of something moving in time x(t) What does x refer to ? the postion of something NAME this refers to the postion of something x What does ∆ mean? a change in something NAME this means a change in something ∆ What is the name of this greek letter ∆? delta What is the differ quotient? ∆x/∆t What is postion? is a function of time NAME this is a function of time postion What is time? it can not be explained NAME this question canot be answered what is time x means the samething as (1) x(t) (1) this means the samething as x(t) x A (1) occurs btwn 2 times change in postion A change in postion occurs btwn (1) 2 times What is the time interval? [t1,t2] What does the greek letter tau mean? is the greek letter for t' NAME this is the greek letter for t' tau What is the duration of a interval? ∆ t NAME this represents the ∆ t the duration of a intervel what is ∆ x? x2-x1 or change in postion NAME this refers to the change in postion ∆ x What does a strobe photo do? exhbits motion as a succession of displacements NAME this exhibits motion as e succession of displacements strobe photo Draw the (2)differ types of motion and label them see notes Draw the most common type of motion see notes How do u find ∆ x? (2) (1)x2-x1 or (2)[x(t2)-x(t1)] In what type of motion is the velocity a constant? motion in striaght lin What type of motion does not always have a consant motion? Draw picture movement down a incline such as what galio did (see notes for pic) (1)and (2)are called infintesimals dt and dx dt and dx are called (1) infintesimals T or F v is the same thing as speed false are velocity and speed the same thing? no NAME he studied a simple motion w variable velocity galileo What did galileo study ? a simple motion w variable velocity V(0) can also mean (1) v0 (1) can also mean V0 V(0) What is v stand for? velocity What is v? is the rate of change of postion w respect to time NAME this is the rate of change of postion w respect to time v What is v? is the rate of change of postion w respect to time What is free fall? refers to when u throw a ball striaght up in the air NAME refers to when u throw a ball striaght up in the air free fall Draw a pic of free fall including labels see notes how do u find the accelration? a= ∆ v/∆ t how do u find the a? a=∆ v/∆ t What does a stand for? acceleration going up has a (1)accelration postive going down has a (1)acceleration negative What is a? is the rate of change of v w respect to time NAME this is the rate of v w respect to time a What does the word accelartion mean in latin? ac-celera-tion ac= means more celera= latin means "celeritas" or celerity meaning faster NAME part of this word comes from the latin word "celeritas" or celerity meaning faster and ac for more aceleration How do u find energy? E=mc62 How do u find V(t)? V(t)=d∆ x/d∆ t or lim ∆ x/∆t ∆ t-0 NOTE: the derivative we already be given in the problem but it will not tell u that it is the derivative How do u find a? a=∆ v/∆ t what is the speed of light? c= 3 *10^8 Draw a graph showing the differ parts from t1 to t2. Be sure to label see notes How do u find ∆ tau? ∆t/n How do u find ∆ v? ∆ t how do u find ∆ v? ∆ t what do the symbols <> mean? the sum of what is it in Most cars have a (1)acceleration smooth or constant you have a (1)accelration when u brake negative When driving your care, you have a negative accelration when you (1) brake What does each symbol mean for the following formula? V=Vo +t V=veliocity Vo=inital veliocity =average acceleration t=time How do u find velocity? V= vo + What does x stand for? a postion in time How do u find x? x=xo+t What do the following symbols mean? x=xo+t x= postion in time x0= inital x =average veliocity t=time What are (2)MAIN forumlas u can use only when the acceleration is constant? (1)v=v0+at (2)x=xo+1/2(vo+v)t What dedication can you make about the if there are the same amount of numbers, meaning the accerlation is constant? (2) that can equal the number in the middle or the midpoint = vo+v/2 (2) Therefore x=vo + at1+a2t2/2 or x=vo+ 1/2(vo+v) NOTE: the same applies for anything else such as tau When can =1/2(vo+v)t or =vo+a1t1+at2/2? when the are the same number of intervals then the average number is hte middle number or a constant accerlation When there are equal amounts of numbers being equal distance from each other , meaning hte accerlation is constant then (1) the average is the midpoint or middle number if u have two different times and the numbers where equal, how would u find the ? a(t)1=v = vo+ (v1-v0+v2-v0)/2 v=vo+at is similar to the (1) algerbraic theory when graphing y=b+mx (1)is similar to the y=b+mx theory when graphing v=vo+at What are the (4) formulas that can used if the accerlation is constant? (including the 2 that are dervied from the main 2). (1)v=vo+at (2)x=xo+1/2(vo+v)t (3)x=x0+v0+t1/2at^2 (4)V^2=v^20+2a(x-xo) How formula do you use to find the v if no time is given? v^2=v^2+2a(x-x0) What forumla to find the can u use w any form of motion? ∆ x/∆ t T or F =∆ x/∆ t can be used to find for any type of motion true Can =∆ x/∆ t be used to find for any type of motion? yes How would u graph the accerlation? see notes How would u graph the accerlation w x? see notes When working do not forget to put the (1) untis and work out the math for the units by mulptying them out as well If a is zero then (1) the v is constant if a is (1) then the v is constnat 0 1/2At^2-Vw+d=0 is similar to the (1)algerbaric expression and can be solved using the (2)formula (1)Ax^2+Bx+C (2)quad What is the critcal case? refers to when something min amount a object can reach a certain point in time What is the discrimint? B^2-4AC of the quad formula NAME this always has a physical signficance discrimint The (1)can be used to find the critical case discrimint the discrimint can be used to find the (1) critical case How do u find the critical case? critcal v= v = B^2-4AC If u throw something up in the air, would a be postive or negative? Why? negative bc u are going against gravity If a ball is falling from a building, would its a be postive or negative? Why? postive bc gravity is centered toward the middle of the earth What is g on earth? 9.8 m/s^2 When throwing a ball vertically or striaght up into the air, when the max height is reached, what is the v? 0 When throwing a ball striaght up into the air or vertically, what when will the v equal zero? when the ball reaches its max height What is the slope of a graph? Δ t/ Δ v What did Galieo say about free falling objects? he said any object at free fall w out air resistance near earth's gravity has a constant accerlation Any object at free fall w out air resistance near earth's gravity has a (1) constant accerlation Why do two objects such as a peice of paper (not crumbled up) and a rock dropped do not land on the ground at the same time? bc of air resistance What does y1 stand for? the max hieght of a free falling object NAME this represnts the max height of a free falling object y1 T or F A car can only have a constant a false What is scalar quanity? is ordinary number NAME this refers to a ordinary number scalar quanity What is a vector? is a directed quanty of numbers NAME this is a directed quanity of numbers vector What is the main differ btwn a vector and scalar? a vector has a directional space where as a scalar does not NAME the main differ btwn a scalar and this is that it has a directional space and a scalar does not vector What are some examples of scalars? (2) (1)mass (unassigned numbers) (2)charges (signed numbers NAME examples of these include mass (unassigned numbers) and charges (signed numbers) scalars T or F scalars do not always have to have signs true Do scalars always have to have signs? no Does mass have signed or unsigned numbers? unsigned Does charges have signed or unsigned numbers? signed What are some examples of vectors? (2) (1)displacement (2)force NAME some examples of these are displacement and force vectors What is displacement? refers to a change in postion NAME this refers to a change in postion displacement NAME this is simplest vector displacement Displacement is the (1)vecotor simplest What is force? refers to a push or pull NAME this refers to a push or pull force What notation represents a vector? → A or → What does the symbol mean? → A that A is a vector → A can indicate the (1) mangintude (1) can indicate the mangintude → A or vector What does the following symbol stand for? → a acceleration vector What does the following symbol stand for? → v instantious velocity vector The (1) of a vector is the scalar mangintude The magintidue of the vector is the (1) scalar Vector lie in (1) and (2) diminesions 1D and 2D What is a right triangle? a triangle w a 90 degree When you have a right traingle, u can use what formula? a^2+b^2=c^2 What is a line segment triangle? (2) refers to when 2 vectors are going in the same direction (2)therefore, the → → → C = A + B NAME TRiANGLE Because this traingle has 2 vectors that are facing the same directions, → → → C = A + B a line segment traingle Can u add two differ types of vectors? no T or F u can add two different types of vectors false How do u find the v of a free falling object? v=v0+|g|t How do u find y for a free falling object? y= v0 + t- 1/2gt^2 T or F u can have a negative gravity false Can u have a negative gravity? no If you are not giving the time of a free falling object, how do u find the v? v^2=v^2-2gy Use Graph A, → → (1)what is the A + B? See answer key Use Graph C, → → (1)What is the sum of A + B? see answer key for graph C Vectors obey the (1)law the parrelogram → What does S stand for? the sum of two vectors T or F the order of the sum of the vectors matters false Does the sum of the vectors depend on the order they are in? no Vectors that are (1)from each other equal adjacent or across from each other Vectors that are ajacent from each are (1) equal T or F adjacent or vectors across from each other have equal displacements true → → A - B = (1) → → A+(-B) → What does D stand for? the difference btwn two vectors T or F can have a negative value for a vector false bc vectors are unsigned numbers Can you have a negative value for a vector? no Why can you not have a negative number for a vector? bc vectors are unsigned numbers → → A+(-B) = (1) → → A - B What is this called? → → B + (-B)=0 the zero factor → → B + (-B)=(1) 0 → D=(1) → → → → A-B=A+(-B) You watching a car speeding up down the road. The car is moving in a curve. Draw a diagram and explain how you would find the displacement from when you saw the car and when you last saw the car see diagram B on the answer key Using Graph B, → (1)how would u find X? → → → r1 + Δr = r2 The order of the vectors is important when (1)vectors subtracting The (1)of the vectors is important when subtracting the vectors order → D can also equal (1) → -D → (1)can also equal -D → D → What does P stand for? the product of a vector and scalar → How do you find the P? → → P= kC → (-1)C can also be written as (1) → -C → (1)can also be written as -C → (-1)C What is newton's law of motion? → → F= ma Id the what the differ symbols stand for in Newton's law of motion? → → F= ma → F= vector of total force on a object m= mass → a= vector of acceleration What does vector components? refers to x coordinates NAME this refers to x coordinates vector components Using graph D, how would you find vector V? by adding Vx and Vector Vy What are unit vectors? they have a magintude of 1 NAME these vectors have a mangintude of 1 unit vectors What does vector Vx equal? iVx What does vectors Vy represent? jVy NAME this represents i(vector Vy) Vector Vy NAME shi represents i(vector Vx) Vector Vx Graph the following VECTOR 3i+2j see graph E Graph the following VECTOR -3i+2j see graph F Graph the following VECTOR -3i-2j See graph G Graph the following VECTOR 3i-2j see graph H Using graph I, what is A, B, and C? A=Vx B=Vy C=V If the angle is rotated clockwise the angel is a(1)angle postive If a angle is roated (1)than the angle is postive clockwise If a angle is rotated (1)than the angle is negatitve counterclock wise If an angle is rotated counterclock wise than the angel is (1) negative Vector Vx = i (vector Vx) How do u find sin, cos, and tan? SOHCAHTOA What is sec? 1/cos What is csc? 1/sin NAME 1/sin csc NAME 1/cos sec What is cot? 1/tan NAME 1/tan cot If you are given the V(magnitude) and the angle alpha how would u find Vx and Vy? Vx= Vcos= +/- cos alpha Vy= Vsin= +/- sin beta What trig funciton can be used to find x or vector Vx? cos What trig function can be used for find the vector Vy? sin Given S = (1) Δ vector r/ Δ vector t Can you drive a car around a car at a constant speed? yes but slowly if vector v1 and vector v2 are equal then it is a (1) isolceles traingle and two of the angles are equal to 90 degrees and bc of this u can conclude that that triangle is perpendicular If (1) then you conclude that the traignle is a isoslacles traingle and that it has two 90 degree angles and is perpendicular vector v1= vector v2 Suspose something is moving around in a circle around a object at a constant speed (1)draw pic of the differ vectors and what it would look like (2)what can you conclude? (1)see graph J on the (note card) (2)that there are right angles in the circle and there is a constant magnitude but the accerleration is different When a object goes around a curve, at what point is v constant? draw a pic of ure answer see graph K, Answer= vector B When a obeject is going around a curve, at what point is v decreasing? see graph K, Answer= vector A When a object goes around a curve at what point is v increasing? See graph K, Answer= vector C Using graph K, For vector A, (1)what is the v doing? (decreasing, remaining constant, or increasing) (2)What is the angle? (1)decreasing (2)obtuse Using graph K, For vector B, (1)what is the v doing? (decreasing, remaining constant, or increasing) (2)What is the angle? (1)v is constant (2)right angle Using graph K, For vector C, (1)what is the v doing? (decreasing, remaining constant, or increasing) (2)What is the angle? (1)v is increasing (2)the angle is a acute angle A car goes around a curve, draw a pic of the differ directions the vectors can be in. (2)label any observations or conclusions that can be made bc the object is going around a curve see graph E(answers, At the perpendicular point of the curve, v is (1) constant vector a = (1) vector a= Δ vector v / Δ vector t How do you find vector a? Δ vector v / Δ vector t How do u find vector v for any motion? Δ vector x /Δ vector t With ideal projectile motion, u start time and the postion at (1) 0 or the orgin How do u find the range of a vector? R=v^2sin2θ/g Sin2θ= 2sinθcosθ (1)=2sinθcosθ sin2θ If both balls are falling down on the postion of the y axis then (1) both balls will hit the ground at the same time What is the law of inersa? w/out forces a object would keep on moving in a line w a constant speed NAME w/out these, a object would keep on moving in a line w a costant speed force What would happen if there where no forces acting on a moving object? the object would keep moving in a line w a constant speed Using graph L (note card, what would the object thrown look like w out any forces acting on it such as gravity? draw in vector v(t)? see graph graph F (answers