# Shared Flashcard Set

## Details

Physics Semester Review ch 2
Semester Review
13
Physics
01/08/2012

Term
 Frame of reference
Definition
 A coordinate system for specifying the precise of locations in space.
Term
 Displacement
Definition
 The change of position of an object.
Term
 Formula for displacement
Definition
 Displacement= final position - initial position
Term
 Average Velocity
Definition
 The total displacement divided by the time interval.
Term
 Formula for average velocity
Definition
 displacement----------- time interval
Term
 Instantaeous Velocity
Definition
 The velocity of an object at one instant.
Term
 How to find the instant velocity?
Definition
 The instantaneous velocity can be found by measuring the slope of the line that is tangent to the point on the graph.
Term
 Acceleration
Definition
 The rate of change of velocity.
Term
 Formula for acceleration
Definition
 change in velocity --------------- change in time
Term
 Formula for displacement with constant uniform acceleration
Definition
 displacement= 1/2 (vi+vf)t
Term
 Free Fall
Definition
 Motion of an object falling with a constant velocity.
Term
 With no air resistance how do objects fall?
Definition
 They fall with the same acceleration regardless of their masses.
Term
 What is the constant acceleration of objects on Earth?
Definition
 -9.81m/s2
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