1.1 Kinematics

Question 1

what is kinematics?

Answer 1

the study of motion

Question 2

distance (d)

Answer 2

the total length of the path travelled by the object in motion

Question 3

motion

Answer 3

a change in an objects location as measured by a particular observer

Question 4

direction

Answer 4

the line an object moves along from a particular starting point

Question 5

scalar

Answer 5

a quantity that has only magnitude
ex. 112m/s

Question 6

vector

Answer 6

quantity that has only magnitude and direction ex. 112m/3 (e)

Question 7

position (d)

Answer 7

the distance and direction of an object from a reference point

Question 8

displacement (^d)

Answer 8

the change in position of an object

Question 9

when is the displacement formula used

Answer 9

when the object only changes postion once

Question 10

when is the total displacement formula used

Answer 10

when the object moves more than once

Question 11

vector

Answer 11

anything that has a magnitude and direction

Question 12

describe a vector

Answer 12

• and arrow with a specific length and direction
• represented with a “vector scale diagram”

Question 13

equal vector

Answer 13

vectors that have the same magnitude and direction

Question 14

opposite vectors

Answer 14

same magnitude, oppostie direction

Question 15

average speed

Answer 15

the total distance travelled by the total time taken to travel that distance

Question 16

average velocity

Answer 16

total displacement or change in position

Question 17

position-time graph

Answer 17

a graph representing the motion of an object

Question 18

uniform motion

Answer 18

motion at a constant speed in a straight line

Question 19

non-uniform motion

Answer 19

motion not at a constant speed or in a straight line

Question 20

acceleration

Answer 20

how quickly an objects velocity changes over time

Question 21

secant

Answer 21

a line that contacts a curve at two different points

Question 22

tangent

Answer 22

a line that connects a curve at only one point

Question 23

average velocity

Answer 23

• change in position over time
• large time interval=more varied solution
• represented by secant line

Question 24

instantaneous velocity

Answer 24

• change in position at a specific instance in time
• represented by tangent line

Question 25

velocity time graphs

Answer 25

slope=acceleration
area=displacement