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30 Cards in this Set
- Front
- Back
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Newton's 1st Law of Motion
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I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
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Newton's 2nd Law of Motion
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II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
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Newton's 3rd Law of Motion
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III. For every action there is an equal and opposite reaction.
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ΔX=Xr-Xi
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the change in (the interval for) any quantity whatever may be found by subtracting the intial value for that quantity from its final value
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Vav= Δd/Δt
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the average speed of an object may be found by dividing the distance of the object traveled by the time over which that travel tok place
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a ⃑va= Δv/∆t
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the verage acceleration is the change in speed (or velocity) divided by the time over which that change in speed (or velocity) has taken place
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∆d=Vi∆t+1/2 ava∆t^2
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the change in distance is equal to the inital veocity mutuplied by the change in time added to one half of the averae acceleration mutuplied by the change in time squared
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%D=((m-o))/m*100%
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constiancy is measured by diviation (D)which is equal to one specific measurement (o) subtracted from the average of all the trials (m) and divided by the average of all the trials (m)then multuplied by one-hundred percent
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%E= ((A-o))/(A )*100%
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accuracy is measured by the percent error (E) which is equal to one specific experimental result(o) subtracted from an accepted value (A) divided by the accepted value (A) and mutuplied by one-hundered percent
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m= Ff/(Fn )
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the coefficent of friction is equal to the final force (Ff) divided by the normal force (Fn)
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Fav=MAg
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Gravity is equal to the mass multuplied by the average acceleration
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N= Ff/Fn
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Newtons are equal to the final force divided by the normal force
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Quantity
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some property of the physical worl which we measure
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Distance
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- main symbol is d
- measured in meters (m) - scalor - inital distance -- di - final distance -- df distance @ which u travel --Δd |
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Position
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- d with an arrow above it = symbol
- vector - intial position is main symbol w/ sub i - final position is same as inital but instead of i there is f - change in position symbol is the delta d w/ arrow above d - measured in meters (m) |
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Time
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- t
- ti is inital time - tf is final time - delta t is time elapsed or change in time - seconds (s) - vector |
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Speed
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- v
- vi -- inital speed -vf -- final speed - delta v is change in speed - average speed is vav - mepers per second - scalor |
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Velocity
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- velocity always has a arrow above the v when using symbol
- vi-- inital velocity - vf -- final velocity - change in velocity is delta v - average velocity -- vav - m/s, direction - Vector |
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Acceleration
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- a = symbol
- average accel is ava - it is a vector |
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Mass
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- m
- measured in kg - Scalor |
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Force
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- symbol is F
- weight is Fw - friction is Ff - measured in kgm/s^2, N - Vector |
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Vector
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those quantities (properties of physical world which we measure) which must have both magnitutde and direction specified
eg: position -- 47m,E |
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Scalor
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those quantities which have magnitutde only
eg: distance -- 47m |
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Sin
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opp/hyp
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Cos
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adj/hyp
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Tan
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opp/adj
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ava=2∆d/∆t
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average acceleration is equal to two times the change in distance divided by the change in time if the inital velocity is equal to zero and the final velocity is equal to zero
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vav= vi+vf/2
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average velocity is
equal to the inital velocity added to the final velocity divided by two if the acceleration is in uniform |
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Net force
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is the vector sum of all forces acting on an object
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protocol, accuracy, precision
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protocal is a set of rules or standards one follows and will eliminate the chance of error, accuracy is close to but not exact, precision is exactness
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