# Shared Flashcard Set

## Details

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

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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