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