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25 Cards in this Set

  • Front
  • Back
Fundamental physical quantities
mass, length, time
Derived physical quantities
density, displacement, velocity, acceleration, force, weight, pressure, energy, power
Density (ρ)
mass per unit volume; = m/V
Displacement
a measurement of distance of the movement of a particle in a medium as it transmits a wave
Velocity (v)
rate of change of position
Acceleration (a)
change in velocity over time; = F/m
Force (F)
how a massive body is affected by acceleration; (weight); = ma
Pressure
Energy
a measure of capacity to do work
Work
= Fd
Power
energy per second
Unit of Force (F)
Newton = kgm/s2; dyne = gcm/s2
Unit of Pressure
N/m2; dynes/cm2
1 Newton (N) = ? dynes
= 100,000 dynes
Unit of Power
Joule (J) per sec (J/s); Watts
1 Joule = ?
= 1 N x 1 m
1 calorie = ?
= 4.1 Joule
Newton's 1st Law
Inertia
Newton's 3rd Law
Reaction Forces
Inertia
an object in motion stays in motion, a static object stays static; until some force is applied
Reaction Forces
With every force there must be associated an equal reaction force of opposite direction
Potential Energy
Stored energy
Kinetic Energy
Energy of motion
Law of Conservation of Energy
Total energy does not change
Thermal Energy
Energy of friction