# Shared Flashcard Set

## Details

AP B Physics-Chapter 4
Forces and Newton's Laws of Motion
7
Physics
11/10/2007

Term
 Inertia
Definition
 Inertia is the tendency of an object to continue to stay at rest or in motion at a constant speed along a straight line.
Term
 Forces and Mass
Definition
 A force is a push or a pull and is a vector (like velocity, displacement, and acceleration). Mass is a property of matter that determines how difficult it is for an object to speed up or slow down and is a scalar.
Term
 Newton's 1st Law of Motion
Definition
 An object at a state of rest or in a state of motion at a constant speed along a straight line unless compelled to change that state by a net force. IN OTHER WORDS... F=0 iff the object is at rest or in motion at a constant velocity (a=0)
Term
 Newton's 2nd Law
Definition
 When a net external force ΣF acts on an object of mass m, the acceleration that results is directly proportional to the net force and has a magnitude that is inversely proportional to the mass. IN OTHER WORDS... ΣF=ma
Term
 Newton's 3rd Law
Definition
 For every action, there is an equal and opposite reaction. In other words, a force in a action-reaction pair is equal to the force pushing against it. F12=F21
Term
 The Gravitional Force
Definition
 F=G*m1m2            r2 G=6.673*10-11 N*m2/kg2m=mass of objectr=distance between both objects
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