1.1 Kinematics Flashcards
what is kinematics?
the study of motion
distance (d)
the total length of the path travelled by the object in motion
motion
a change in an objects location as measured by a particular observer
direction
the line an object moves along from a particular starting point
scalar
a quantity that has only magnitude
ex. 112m/s
vector
quantity that has only magnitude and direction ex. 112m/3 (e)
position (d)
the distance and direction of an object from a reference point
displacement (^d)
the change in position of an object
when is the displacement formula used
when the object only changes postion once
when is the total displacement formula used
when the object moves more than once
vector
anything that has a magnitude and direction
describe a vector
- and arrow with a specific length and direction
- represented with a “vector scale diagram”
equal vector
vectors that have the same magnitude and direction
opposite vectors
same magnitude, oppostie direction
average speed
the total distance travelled by the total time taken to travel that distance
average velocity
total displacement or change in position
position-time graph
a graph representing the motion of an object
uniform motion
motion at a constant speed in a straight line
non-uniform motion
motion not at a constant speed or in a straight line
acceleration
how quickly an objects velocity changes over time
secant
a line that contacts a curve at two different points
tangent
a line that connects a curve at only one point
average velocity
- change in position over time
- large time interval=more varied solution
- represented by secant line
instantaneous velocity
- change in position at a specific instance in time
- represented by tangent line
velocity time graphs
slope=acceleration
area=displacement
