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# Unit 4 Flashcards

### Vectors and Forces

Vector A quantity that has both magnitude and direction
Scalar A quantity that has magnitude only
Magnitude the amount of a given measurement
Displacement a vector quantity which describes distance and direction
Component a single vector that may be added to one or more other vectors
Resultant the sum of any number of component vectors that are added together
Tip-to-tail a method of vector addition
Vector resolution a method of finding component vectors from a given resultant
Dynamics the branch of physics that describes how forces interact with matter
Equilibrium a state where the sum of the net forces acting on the object is zero
Inertia the force generated by an object’s weight
Weight the mass of an object times the acceleration due to gravity
Friction a force caused by electron repulsion
Air resistance a frictional force that acts against gravity as an object free falls
Static Friction a force that makes it difficult to move an object
Kinetic Friction a force that makes it difficult to keep an object moving
Net Force the difference between the applied force and friction
Normal Force a force that acts opposite gravity
Equilibrant a force that will place an object in equilibrium
Unbalanced Force an applied force that will take an object out of equilibrium
Created by: mrmpellegrino