front 1 How are the movements of an object restricted in motion in one direction/straight line motion? | back 1 It's restricted to moving along a single axis |
front 2 What is position? | back 2 The location of an object in space relative to another point |
front 3 When coordinates are used to describe position what is the reference point? | back 3 The origin (0,0) |
front 4 True or false, origins are fixed points. | back 4 False, anything can be the reference point used as an origin |
front 5 What is displacement? | back 5 A quantity that expresses a difference in position |
front 6 What is the symbol used to denote position? | back 6 x (lowercase X) |
front 7 What is the mathematical description for displacement? | back 7 delta x = xf - x0 |
front 8 What is distance? | back 8 Total path length |
front 9 What is the symbol used to denote distance? | back 9 d (lowercase D) |
front 10 Distance travelled is always (+/-) but delta x is not. | back 10 + |
front 11 What is the difference between displacement and distance? | back 11 Displacement is path-independent, it is only the distance between the start and end point. The length of the path does not matter to displacement, but the length of the path is what is measured in distance. |
front 12 2 people running collide, at the time of collision they must have the same...
| back 12 1. Position |
front 13 What are the two components to a vector? | back 13 The numerical one and the directional one |
front 14 50 km/h is not a vector. What is it missing? | back 14 A direction. Ex. 50 km/h north or 50 km/h up or 50 km/h left |
front 15 How are vectors represented graphically? | back 15 An arrow pointing in the appropriate direction |
front 16 For a 1D vector (think of straight line motion), direction is determined exclusively by _____________. | back 16 sign |
front 17 Whether a vector is negative or not, the _____________ is always positive. | back 17 Magnitude |
front 18 How many different terms are associated with velocity? | back 18 4 |
front 19 What is the symbol for time in math? | back 19 t (lowercase T) |
front 20 What is average velocity? (mathematically and in words) | back 20 vav=delta x/delta t=Displacement/change in time vav describes how quickly an object changes position over a time interval |
front 21 What is instantaneous velocity? (in words) | back 21 Velocity at a specific point in time, not over a time interval. |
front 22 What is average speed? (mathematically and in words) | back 22 A scalar quantity representing the distance travelled over a change in time sav=d/delta t |
front 23 What is instantaneous speed and what is its symbol? | back 23 The speed (v) at a specific point in time; the magnitude of the velocity vector |
front 24 What do speedometers in cars measure? Explain. | back 24 Instantaneous speed. The speedometer measures distance travelled (not displacement) over time at a specific point in time. |
front 25 Differentiate uniform to non-uniform motion. | back 25 uniform motion is a constant velocity while non-uniform motion implies that velocity is changing |
front 26 Uniform velocity implies that neither _______________ nor _______________ are changing. | back 26 Speed nor direction |
front 27 How quickly velocity is changing is described by what? (name and symbol) | back 27 acceleration (a) |
front 28 Describe average acceleration mathematically. | back 28 aav=change in v (velocity)/change in t |
front 29 If a is constant then a=______, and vf is given by ___________________. | back 29 aav, vf=v0+at |
front 30 What are the common units for acceleration? | back 30 m/s2, can be thought of like (m/s)/s |
front 31 If I tell you than an object's velocity is 0 at t=1s and ask you for its acceleration, what information are you missing? | back 31 A change in time and a change in velocity. |
front 32 If acceleration is constant how can vav be expressed mathematically? | back 32 vav=(v0+vf/2) |
front 33 How can you tell if an object is speeding up or slowing down by looking at its v and a? | back 33 If an object is speeding up v and a will have the same sign (positive or negative), but if an object is slowing down they will have different signs. Ex. v=+5 m/s and a=+1 m/s2 means speeding up but... v=+5 m/s and a =-1m/s2 means slowing down |
front 34 What dos the variable x represent? | back 34 displacement |
front 35 What does the variable v represent? | back 35 velocity |
front 36 What does it mean for v and a if motion is uniform? | back 36 v is constant and a is 0 |
front 37 How many unknown variables can you have per equation? How many equations do you need if you don't know 3 variables? | back 37 1 per equation, 3 equations |
front 38 When you take the square root of a number, how many answers do you get? | back 38 Two, one positive, the other negative |
front 39 On a position vs time graph how will uniform motion appear? | back 39 Linear |
front 40 On a position vs time graph the slope connecting points a and b is the _____________ _____________ over the time interval from a to b. | back 40 average velocity |
front 41 On a position vs time graph how will non-uniform motion appear? | back 41 curved (acceleration is not 0, it is changing positively or negatively) |
front 42 What is a tangent line? | back 42 The slope at a given point in a curved line |
front 43 On a velocity vs time graph, if __________________ is constant then you will have your change in time be equal to your velocity | back 43 acceleration |
front 44 What is displacement on a velocity vs time graph? | back 44 The area under a specified change in t and v Ex. from t=1 to t=3 |
front 45 Objects thrown or dropped will accelerate due to what? | back 45 Gravity |
front 46 Do all objects in free fall accelerate at the same rate regardless of mass? | back 46 Yes |
front 47 For an object on free fall how may acceleration be represented (as an equation) | back 47 a = -g, where g is a positive scalar |
front 48 For obejcts in free fall that have been tossed up upon release what happens momentarily at their maximum heights? | back 48 They stop moving |
front 49 How is motion in 2D different from 1D? | back 49 Motion happens on a surface as opposed to on a straight line |
front 50 When adding vectors graphically (by drawing them out) how do you align them? | back 50 From tip to tail |
front 51 When adding vectors, does the order you do them in matter? | back 51 No |
front 52 When subtracting vectors does the order you do them in matter? | back 52 Yes |
front 53 When multiplying vectors by a scalar (a number without direction) only the _______________ changes (unless the scalar was negative) | back 53 magnitude |
front 54 What are unit vectors? | back 54 vectors with a magnitude of 1 |
front 55 longer vectors can be expressed by _____________ a unit vector by a scalar | back 55 multiplying |
front 56 Finding the components of a vector is often referred to as ______________________ it. | back 56 resolving |
front 57 What is polar form? | back 57 When a vector is described using a magnitude and an angle |