Physics 20 Kinematics

Front 1

kinematics

Back 1

the study of how things move

Front 2

origin

Back 2

a reference point used to measure the position of objects in relation to the origin

Front 3

position

Back 3

vector quantity specifying where an object is - how far away from and what direction from the origin (m)

Front 4

scalar quantity

Back 4

values that only give magnitude
ex. speed, mass, distance

Front 5

vector quantity

Back 5

measurement that give direction as well as magnitude. Differentiated by an arrow above the abbreviation. Direction is given in [square brackets] after magnitude ex. position, velocity, weight. etc.

Front 6

distance

Back 6

(scalar) length of the path taken to move from one position to another. Add up all distances! (m)

Front 7

displacement

Back 7

(vector) length of distance between object and reference point (initial and final) positions. Do not use all distance; draw and measure a straight line from position A to B (m)

Front 8

position-time graph

Back 8

curved slope = accelerating
straight slope = constant velocity
straight horizontal line = at rest

Front 9

speed

Back 9

scalar quantity outlining how fast an object is going
*objects can be going the same speed but have different velocities!

Front 10

velocity

Back 10

(vector) outlining how fast an object is going and what direction - m/s

Front 11

uniform motion

Back 11

when the object is going complete constant velocity; one speed, one direction.
*technically impossible since Earths surface is curved

Front 12

velocity-time graph

Back 12

slope = acceleration
straight horizontal line = constant velocity (no acceleration)
area beneath velocity line = total displacement
straight diagonal line = constant acceleration

Front 13

non-uniform motion

Back 13

motion where velocity or speed is changing - varying in speed or direction (most motion qualifies)

Front 14

acceleration

Back 14

(vector) quantity that represents change in velocity (magnitude and direction!) per unit of time (m/s2)

Front 15

instantaneous velocity

Back 15

moment-to-moment measure of an objects velocity. On a graph where acceleration is changing, it can be found by drawing a tangent line to the point in which you want to measure and finding the slope of the tangent.

Front 16

tangent

Back 16

straight line drawn that only touches the curve once. Each tangent on a curved line will be different.

Front 17

uniformly accelerated motion

Back 17

constant change in velocity per unit of time. Occurs (graphically) when line is perfectly diagonal.

Front 18

average velocity

Back 18

to find average velocity graphically, calculate area underneath line and divide by total time

Front 19

acceleration-time graphs

Back 19

not a continuous graph; composed of horizontal lines differentiating the segments of journey

Front 20

using kinematics equations, remember...

Back 20

- if object starts from rest, vi = 0m/s
- if object comes to a stop, vf = 0m/s
- uniform motion, a = 0

Front 21

projectile

Back 21

object that is released into the air; object dropped, thrown, etc.

Front 22

projectile motion

Back 22

the trajectory and motion of a projectile while it is in the air. the horizontal and vertical actions of the projectile are completely separate!
create a table outlining different values for horizontal vs vertical