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Chapter 2 Study Guide
Physics
18
Physics
Not Applicable
09/11/2014

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Term
Using graphs, how can you find the average speed of an object?
Definition
The slope of a distance versus time graph is equal to the average speed of an object.
Term
Using graphs, how can you find the instantaneous speed of an object?
Definition
Create a line on the point tangent to the rest of the distance vs. time graph and find it's slope.
Term
Using graphs, how can you find the acceleration of an object?
Definition
Find the slope of a velocity (or speed) versus time graph.
Term
Using a graph, how can you find the instantaneous acceleration of an object?
Definition
Find the slope of a line on that particular point, tangent to the velocity (or speed) vs. time graph.
Term
What can be said of the motion of an object when the signs of the velocity and acceleration are the same?
Definition
It's speeding up.
Term
What can be said of the motion of an object when the signs of the velocity and acceleration are different?
Definition
It's slowing down
Term
Describe the motion of a stone as It rises in terms of position.
Definition
Positive displacement
Term
Describe the motion of a stone as It rises in terms of velocity.
Definition
Positive velocity
Term
Describe the motion of a stone as It rises in terms of acceleration.
Definition
-9.81 m/s^2
Term
Describe the motion of a stone as it falls in terms of position.
Definition
Negative displacement.
Term
Describe the motion of a stone as it falls in terms of velocity.
Definition
Negative velocity.
Term
Describe the motion of a stone as it falls in terms of acceleration.
Definition
-9.81 m/s^2
Term
Describe the motion of a stone at it's peak in terms of position.
Definition
Max height.
Term
Describe the motion of a stone at it's peak in terms of velocity.
Definition
0
Term
Describe the motion of a stone at it's peak in terms of acceleration.
Definition
-9.81 m/s^2
Term
When is an object in free fall?
Definition
When gravity is the only force working against It.
Term
We often approximate falling objects as being in freefall. Why is this not correct?
Definition
Air resistance.
Term
What is the relationship between velocity and speed?
Definition
Both measure how fast and are measured in m/s. But velocity includes direction (negative or positive).
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