# Shared Flashcard Set

## Details

Unit 2
Force and Newton's Laws of Motion
36
Physics
09/24/2012

Term
 State Newton's 1st Law of Motion
Definition
 An object at rest remains at rest, and an object in motion remains in motion at constant velocity, unless acted upon by an unbalanced force
Term
 An object will not accelerate unless____________________
Definition
 acted upon by an unbalanced force
Term
 What is inertia?
Definition
 Tendency of things to resist a change in motion
Term
 What is another name for Newton's first Law?
Definition
 Law of Inertia
Term
 What has inertia?
Definition
 Every object
Term
 If you have more matter, you will have more _______________
Definition
 Inertia
Term
 What is mass?
Definition
 1. Quantity of matter in an object2. Measurement of an object's inertia
Term
 What is weight?
Definition
 Force upon an object caused by gravity
Term
 What is the unit for weight?
Definition
 Newton (N)
Term
 If you have more mass, you will have more weight, therefore these two measurements are _____________________
Definition
 Directly Proportional
Term
 Will mass ever change?
Definition
 No, unless you remove a chunk of an object.
Term
 What does weight depend on?
Definition
 Amount of gravity acting upon it
Term
 Does inertia change?
Definition
 Never
Term
 State Newton's Second Law of Motion
Definition
 Acceleration is directly proportional to the net force of an object, is in the direction of the Net Force, and is inversely proportional to the mass.
Term
 What is the equation for Newton's Second Law?
Definition
 A=F/M
Term
 What is force?
Definition
 a push or pull
Term
 What is a vector quantity?
Definition
 Involve magnitude and direction
Term
 What is a scalor quantity?
Definition
 Involves magnitude, but not direction
Term
 What is force? (Vector/Scalor)
Definition
 Vector
Term
 What are the units of force?
Definition
 Newtons (N)
Term
 What is the equation for a Newton?
Definition
 N=kg x m/s squared
Term
 When is an object in Equilibrium?
Definition
 When the forces acting on it are balanced
Term
 If an object is in motion and in equilibrium, then it is in ____________________
Definition
 Dynamic Equilibrium
Term
 If an object is at rest and in Equilibrium, then it is in _______________________
Definition
 static Equilibrium
Term
 What is a normal force?
Definition
 A force produced by a surface
Term
 What is a tension force?
Definition
 a force produced by a rope or string
Term
 What is friction?
Definition
 A force that occurs when objects slide over each other
Term
 What is friction caused by?
Definition
 The atoms of the two objects clinging together
Term
 Friction always ___________________
Definition
 opposes motion
Term
 The magnitude depends on _____________________
Definition
 Weight and the surfaces in question
Term
 What is Static Friction?
Definition
 between two objects not moving relative to each other
Term
 What is Kinetic Friction?
Definition
 between two surfaces that are moving relative to each other
Term
 What is Kinetic Friction?
Definition
 between two surfaces that are moving relative to each other
Term
 Static friction is ______________ Kinetic friction
Definition
 greater than
Term
 The friction force will ________________, until the _______________________, then you can release your push and ______________________
Definition
 be equal to the pushing force; maximum friction force is beaten: the object will travel at constant velocity
Term
 What is the equation for Friction Force?
Definition
 Ff=,u x Fn
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