# Shared Flashcard Set

## Details

Physics - SSC
Physics Basics, Summer Science 2013
19
Physics
Not Applicable
07/27/2013

Term
 Newton's first law
Definition
 An object in motion stays in motion at a constant speed unless other force is acting on it.
Term
 Newton's second law
Definition
 The acceleration of a body is directly proportional to, and in the same direction as, the net force acting on the body, and inversely proportional to its mass. Thus, F = ma, where F is the net force acting on the object, m is the mass of the object and a is the acceleration of the object. F=M*A
Term
 Newton's third law
Definition
 When one body exerts a force on a second body the second body exerts and opposite force of equal magnitude - for every action there's an equal and opposite reaction.
Term
 Work
Definition
 Amount of energy required to move mass over a certain distance.W=F*D
Term
 Energy
Definition
 Ability to do workAll matter has inherent energy.
Term
 Flow rate
Definition
 Measure of how much fluid is flowing in given time.Cubic metres per second: m3/sec
Term
 Hagen–Poiseuille equation:
Definition
 ΔP=8ηlf / πr4Where: P= Pressureη = Viscosity l= Lengthf= Flowr= radius of tube.Flow rate directly proportional to the 4th power of the radius,
Term
 Levers
Definition
 Change direction of forceAmplify size of forceIncrease size of movement
Term
 Fulcrum
Definition
 Point around which lever moves
Term
Definition
 Object / resistance that the lever moves / overcomes
Term
 Effort
Definition
 Force used to move the lever / load
Term
 1st Class Lever
Definition
 Fulcrum is between effort and load - seesaw
Term
 2nd Class Lever
Definition
 Fulcrum / load / effort - Swing, wheelbarrow
Term
 3rd Class Lever
Definition
 Fulcrum / effort / load - Elbow & knee joint. Mechanical *dis*advantage
Term
Definition
Term
 Effort lever arm
Definition
 Distance between effort and fulcrum
Term