Unit 1: Kinematics Flashcards
Kinematics
the study of motion
Motion
a change in an objects location as measured by a particular observer
Distance (d)
the total length of the path travelled by an object in motion
Direction
the line moves along from a particular starting point
Scalar
a quantity that has only Magnitude (size)
vector
a quantity that has magnitude (size) and direction
position (d–>)
the distance and direction of an object from a reference point
displacement (/_\ –> d)
the change in position of an object
vector scale diagram
a vector diagram drawn using a specific scale
directed line segment
a straight line between two points with specific direction
Average Speed (V av)
the total distance travelled divided by the total time taken to travel that distance
Average velocity(V–> av)
the total displacement, or change in position, divided by the total time for that displacement
Position time graph
a graph describing the motion of an object, with position on the vertical axis and time on the horizontal axis
slope (m)
a measure of the steepness of a line
Rise
vertical change between 2 points on a line
run
horizontal change between 2 points on a line
Motion with Uniform or Constant Velocity
Motion of an Object at a constant speed in a straight line
Motion with Non uniform velocity (Accelerated Motion)
motion in which the object’s speed changes or the object does not travel in a straight line
Acceleration
how quickly on objects over time (rate of change of velocity)
velocity - time graph
a graph describing the motion of an object, with velocity on the vertical axis and time on the horizontal axis
Motion with Uniform Acceleration
motion in which velocity changes at a constant rate
instantaneous velocity
the velocity of an object at a specific instant in time
acceleration time graphs
a graph describing motion of an object with acceleration on the vertical axis and time on the horizontal axis
acceleration due to gravity (g)
the acceleration that occurs when an object is allowed to fall freely, close to Earths surface. g has a value 9.8 m/s’s
Free Fall
the accelerations due tp gravity of object in the absence of air resistance
Terminal Velocity
The velocity of an object when the force due to gravity on the object
resultant vector
a vector that result from adding 2 or more given vectors
component vectors
vectors which when added together gives the original vector from which they were derived: one component is parallel to the axis and the other is parallel to the y axis
projectile
an object that moves along a 2 dimensional curved trajectory in response to gravity
projectile motion
the motion of a projectile under gravity
time of flight
the time taken for a projectile to complete its motion
