Chapter 2 - Representing Motion Flashcards
Define particle model.
Replacing the object/objects of interest w/ single points.
Define motion diagram.
A series of images showing the positions of a moving object at equal time intervals.
Define a coordinate system and its origin.
A coordinate system gives the location of the 0 point of the variable and the direction in which values of the variable increase. The origin is the point at which all variables in a coordinate system have the value zero.
Define position.
The distance and direction from the origin to the object.
Define distance.
The entire length of an object’s path.
What is magnitude?
Size.
State the difference b/w vectors and scalars.
Vector: a quantity that has both magnitude and direction.
Scalar: a quantity that is just a number without any direction. Ex: distance, time, or temperature.
What’s a time interval? Give the formula.
The difference between two times.
A change in position is called ________. Give the formula.
Displacement.
What’s a resultant?
A vector that represents the sum of 2 other vectors.
Define a position-time graph.
A graph in which the time data is plotted on a horizontal axis & the position data is plotted on vertical axis.
Define instantaneous position.
The position at a particular instant.
Define average velocity. Give the formula.
It’s the ration of an object’s change in position to the time interval during which the change occurred. V =
The slope’s absolute value in the object’s average speed. Define average speed.
The distance traveled by the time taken to travel that distance.
If an object moves in the negative direction,, it’s change in position is _________. This means that an object’s ____________ and ________ are both always in the same direction.
- Negative
- Displacement
- Velocity
