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41 Cards in this Set
- Front
- Back
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Mass
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Inertia
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Weight on Earth
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Mass (kg) x 10 N
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Speed
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Distance / time
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Velocity
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Speed with direction
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Acceleration
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Change of velocity / time
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Velocity
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Acceleration x time
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If velocity is a constant, acceleration =
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0
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Free-fall
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Acceleration is constant = 10 m/s/s (on Earth), velocity increases 10 m/s for each s.
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Circular motion
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Velocity changes, so it is accelerating.
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Newton's 2nd Law of Motion
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F=ma
a=F/m "The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object." |
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At terminal velocity, acceleration =
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0
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Non-free fall
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Acceleration decreases
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Impulse
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Force x time
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Impulse derived from Newton's 2nd Law
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a=F/m=∆v/t
Ft=m∆v |
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Momentum
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p=mv
m=p/v v=p/m |
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Law of conservation of momentum
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When no external net force acts on an object or a system of objects, no change of momentum takes place.
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Work (Joules)
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Force x distance
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Power (Watts)
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Work / time
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Gravitational Potential Energy (GPE)
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Weight x height = m*g*h
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Kinetic energy (KE)
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½mv²
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Energy
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Joules
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Gravitational Force
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F=G(m₁×m₂)÷d²
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Inverse-square Law
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F=1/d²
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Coulomb's Law
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F=k(q₁×q₂)÷d²
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Newton's 1st Law of Motion
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An object at rest tends to remain at rest; an object in motion tends to remain in motion at constant speed along a straight-line path.
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Newton's 3rd Law of Motion
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Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. For every action, there is an equal and opposite reaction.
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Conservation of Energy
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Energy cannot be created nor destroyed; it may be transformed from one form to another, but the total amount of energy never changes.
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The Law of Universal Gravitation
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Every mass in the universe pulls on every other mass with a force directly proportional to the product of the two masses and indirectly proportional to the square of the distance between them.
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Coulomb's Law
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For two charged objects, the force between them varies directly as the product of their charges (q) and indirectly as the square of their separation distance (d).
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Voltage
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Electric potential energy / charge
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Current
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Voltage/ resistance
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Amperes
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Volts/ Ohms
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Wire thickness decreases, resistance
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decreases
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Electric potential
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volts
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Electric current
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Amperes
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Resistance
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Ohms
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Lamps in parallel
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Overall resistance is less than each lamp resistance
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Lamps in series
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Overall resistance is sum of all resistances
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Safety fuse
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always in series
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Electric power
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Voltage*Current
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Electric power is measured in
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watts or kilowatts
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