# Shared Flashcard Set

## Details

Unit 1 - Mechanics and Materials
all the formulas and some definitions, tell me if you know anymore :)
32
Physics
12/29/2010

Term
 Speed =
Definition
 distance/time(m/s)
Term
 velocity =
Definition
 displacement/time(m/s)
Term
 acceleration =
Definition
 (v-u)/t(m/s²)
Term
 displacement (s) =
Definition
 ut+1/2at² ORt(v+u)/2(m)
Term
 v² =
Definition
 u²+2as
Term
 volume of a sphere =
Definition
 4/3πr³
Term
 Force =
Definition
 mass x acceleration(N)
Term
 gravitational field strength =
Definition
 F/m
Term
 Weight =
Definition
 mass x gravity (N)
Term
 work done =
Definition
 force in direction of movement x distance moved(Joules)
Term
 kinetic energy =
Definition
 1/2mv²(Joules)
Term
 gravitational potential energy =
Definition
 mass x gravity x height(Joules)
Term
 Efficiency =
Definition
 (useful energy/time)/power input useful energy output/total energy input x100 (percentage)
Term
 density (p) =
Definition
 mass/volume
Term
 Power =
Definition
 work done/time taken energy transferred/time taken force x velocity(Watts)
Term
 1 Horsepower =
Definition
 750 Watts
Term
 upthrust =
Definition
 weight of fluid displaced
Term
 Weight of water displaced =
Definition
 density x volume x gravity(mass x gravity)
Term
 laminar/streamline flow =
Definition
 lower speedsconstant speeds within streamlinespredictable flowless drag
Term
 turbulent flow =
Definition
 higher speeds unpredictable velocitystreamlines crossovereddies/currents may formmore drag
Term
 Terminal Velocity (with small sphere) =
Definition
 2r²g(ps - pf)/9n
Term
 Hookes Lawf=
Definition
 -k x x
Term
 Elastic strain energy =
Definition
 1/2Fx1/2kx²
Term
 Tensile/Compressive stress =
Definition
 force/cross sectional area(Pascals)
Term
 Tensile/Compressive strain =
Definition
 extention/original length
Term
 Young's Modulus =
Definition
 stress/strain
Term
 DUCTILE
Definition
 plastic deformation - stretch into wiresCopper - Wires
Term
 DUCTILE
Definition
 plastic deformation - stretch into wiresCopper - Wires
Term
 BRITTLE
Definition
 break/crack with little deformation BUT doesn't mean weakGlass
Term
 TOUGH
Definition
 ability to withstand impact, require a large force for small plastic deformation, ability to absorb energy.Rubber
Term
 HARD
Definition
 resist plastic deformation (dents/cuts)Diamond drill bits
Term
 MALLEABLE
Definition
 large plastic deformation before breakingGold Gilding
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