Motion |
the change in position of one object in relation to the position of some fixed object/ |
Distance |
a measure of the total length along a path between two points. |
Displacement |
a measure of both length and the direction of an object's path from its starting point straight to its ending point. |
Speed |
the rate at which an object changes position. |
Speed differ from Velocity |
Speed: the ratio of the distance an object moves to the amount of time the object moves Velocity: the speed and direction an object is moving, measured to a reference point |
Acceleration |
the rate of change in velocity. |
Two Examples of Acceleration |
Free falling, and a rocket launch |
Reference Point |
To identify an objects position, you must compare its location with that of another object or place. That other object or object is called.. |
Straight lines |
Distance between reference points and other locations can be measured in ... |
It Has Experienced Motion |
When an object changes position over time, speed describes how quickly an object changes position. |
Speed= |
Distance/Time |
Distance-time graph |
A convenient way to show the motion of an object is by using a graph that plots the distance the object has traveled against time. This is called a... |
A change in Velocity |
a change in either speed or direction results in... Because velocity includes direction, it is possible for two objects to have the same speed but different velocities. |
What velocities include |
Speed and direction. To determine ________ of an object, you need to know both its speed and its direction. |
How acceleration is measured |
How quickly the velocity is changing. If velocity does not change there is no _____________. |
Acceleration= |
Final Velocities-Initial Velocity/Time |
Speed up or slow down |
The direction of the acceleration determines whether an object will.... |
Deceleration |
Negative acceleration is called ________. This means the object is slowing down. |
How Velocity-time graphs and distance-time graphs are related |
Both graphs are related because the distance an object travels depends on its velocity. |
Deceleration= |
Initial Velocity-Final Velocity/Time |
Velocity= |
Distance/Time in a given direction |
Velocity |
The speed and direction an object is moving, measure relative to a reference point |
Velocities in the same direction |
two objects moving the same direction |
velocities in opposite directions |
two objects moving opposite directions |
Relative Motion |
movement in relation to a frame of reference |
Vector |
a quantity that has a direction associated with it |
Resultant Vector |
the vector sum of two or more vectors |
Instantaneous Speed |
the rate at which an object is moving at a giving moment in time |
Average Speed |
the total distance traveled divided by the time it takes to travel that distance |
Constant Acceleration |
a steady change in velocity |
Linear Graph |
a graph in which the displayed data from a straight line |
Nonlinear Graph |
a graph in which the displayed data from a curved line |
Three Changes in acceleration |
change in speed, direction, and both |
The upright slope of a speed-time graph |
the point on the graph that represents acceleration |
The downward slope of speed-time graph |
the point on the graph that represents deceleration |
No movement |
A straight line on the graph represents.. |