# Shared Flashcard Set

## Details

SAT II physics Review
Formulas and concepts.
29
Physics
12th Grade
09/15/2013

## Cards Return to Set Details

Term
 Vector Addition
Definition
 Tail-to-tail (invert circle)OR Parallelogram method
Term
 Vector Substraction
Definition
 Draw negative vector, then DO addition.
Term
 Multiplication by a Scalar
Definition
 Addition N times.
Term
 Magnitude of addition
Definition
 If parallel, just add magnitudes.If perpendicular, A+B=sqrt(A2+B2);If Angle, break A OR B to components, then add component parallel to other vector to other vector. Then add remaining component to resultant vector.
Term
 DOT SCALAR PRODUCT
Definition
 A.B=ABcosTheta
Term
 CROSS VECTOR PRODUCT
Definition
 AxB=ABsinThetaAxB is perp. to both A and B.Direction of AxB by RIGHT HAND RULE.(Curl fingers from A to B. \$(thumb));
Term
 Direction of Vector at xy-coordinate system
Definition
 Theta=arctan(Ay/Ax);
Term
 XY components
Definition
 Ax=A.cosThetaAy=A.sinTheta
Term
 Vector addition on graph
Definition
 A+B=(Ax+Bx)X+(Ay+By)Y
Term
 average speed
Definition
 Distance/deltaT
Term
 average velocity
Definition
 DeltaS/DeltaT
Term
 instantaneous velocity or speed
Definition
 assume DeltaT is very smallASKED BY DEFAULT
Term
 Average Acceleration
Definition
 DeltaV/DeltaT
Term
 POSITION VS. TIME graphs
Definition
 Can determine position at t.Can determine velocity by slope: DeltaY/DeltaT
Term
 POSITION VS TIME CURVED GRAPH
Definition
 No worries. No calculations. Velocity at top of hills and bottoms of valleys is 0. Velocity is greater at steeper slopes. Downward slopes are negative and so velocity in them is a big negative number. Speed is huge though.
Term
 Velocity vs time graphs
Definition
 Can determine velocity at t.Can determine direction of movement.Can determine acceleration : SLOPEIT IS POSSIBLE FOR VELOCITY TO BE AT 0 WHILE ACCELERATION IS NOT.
Term
 Areas under graph
Definition
 The displacement in a given time interval is equal to the area under the graph during that same time interval.If area is above axis, positive, opposite is true. AREAS ARE CHANGE, NOT AVERAGE OR FINAL.
Term
 Kinematic equations
Definition
 x=x0+1/2(v+v0)tx=x0+v0t+at.pow(2)x=x0+vt-at.pow(2)v.pow(2)=v0.pow(2)+2a(x-x0)v=v0+at
Term
 When they say starts from rest
Definition
 It means v0=0
Term
 When they say comes to rest
Definition
 It means v=0
Term
 When they say Moves at a constant velocity
Definition
 It means a=0;
Term
 Two dimensional movement ?
Definition
 Break V down to Vx and Vy
Term
 V= ? [two dimensional movement]
Definition
 SQRT(Vx.squ+Vy.squ)
Term
 Work
Definition
 W=F.s.cosTheta
Term
 KE ?
Definition
 1/2mv.squ
Term
 U ? (Potential energy)
Definition
 W=-Delta U
Term
 Mech. Energy ?
Definition
 Delta KE= - Delta UE is a constantOnly applies to CLOSED SYSTEMS (no friction)
Term
 Power
Definition
 Delta Work OR Delta Energy / Delta time
Term
 Instantaneous Power
Definition
 F.v
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