Kinematics, Motion In One And Two Dimensions Flashcards
Distance
The length of the complete path traveled by a moving object
Displacement
The length of the straight line from a moving object’s original position to its final position.
An objects displacement is always….
Less than or equal to the DISTANCE traveled.
Velocity (vector)
Change in an objects displacement over a period of time
Includes both magnitude and direction
Speed (scalar)
The distance traveled by an object over a period of time
Includes magnitude only
Position vs Time
Horizontal line graph
Constant zero slope -> motionless object
Object at rest no velocity
Direct graph
Direct relationship Increasing graph Positive slope Constant "flat line" Moving with constant positive velocity
Curvy graph increasing
Increasing slope -> moving with increasing velocity
Using velocity v. time graphs we can find…
The average velocity of any constant slope by using the average velocity formula
Acceleration (vector)
The change in an objects velocity occurring over a period of time
Measured in meters per second squared (m/s^2)
Velocity positive & acceleration positive
0° angle between the vectors. Both vectors point in the same direction. The object will speed up in the positive direction.
Velocity negative & acceleration positive
180° angle between the vectors. Both vectors point in opposite directions. The object will slow down then speed up in the positive direction.
Velocity positive & acceleration negative
180° angle between the vectors. Both vectors point in the opposite direction. The object will slow down then speed up in the negative direction.
Velocity negative & acceleration negative
0° angle between the vectors. Both vectors point in the same direction. The object will speed up in the negative direction.
“Acceleration is a _______________________ in velocity” “the slope of a v-t graph tells what the ACCELERATION IS DOING!!”
Rate of change
