# Shared Flashcard Set

## Details

BHS Physics Midterm
Terms to know
58
Physics
01/19/2010

Term
 Standard
Definition
 An established norm or requirement. A controlled artifact used for calibration.
Term
 MKS System
Definition
 Measurement system based in meters, kilgrams, and seconds; ie newton.
Term
 SI
Definition
 International System of Units (metric system)
Term
 CGS
Definition
 Measurement system based in centimeters, grams, seconds
Term
 British Engineering
Definition
 Measurement System based in feet, slugs, seconds
Term
 Fundamental Units
Definition
 Measure physical quantity. One of basic 7 units of measurement.
Term
 Derived Units
Definition
 Measure physical quantity.Based on several fundamental units.
Term
 Significant Figures
Definition
 9,000,000 = 1 sf.020750 = 5 sf
Term
 Scalar
Definition
 Measurement which requires magnitude only (Speed and distance)
Term
 Vector
Definition
 Measurement which requires both magnitude and direction (Velocity)
Term
 Tolerance
Definition
 Degree of Precision of Scientific Equipment
Term
 Precision
Definition
 How close several measurements made in the same manner are to each other
Term
 Accuracy
Definition
 How close a measurement is to an accepted value
Term
 Mass
Definition
 Measurement of quantity.Amount of matter in an object.
Term
 Weight
Definition
 Measurement of quantity.Force which is the measure of the product of the mass of an object and the acceleration due to gravity.
Term
 Potential Energy
Definition
 Stored Energy
Term
 Kinetic Energy
Definition
 Energy due to motionKE=(1/2)mv^2
Term
 Direct Proportion
Definition
 [image]
Term
 Indirect proportion
Definition
 [image]
Term
 Order of Magnitude
Definition
 9.8 x 10^8 = 10^93.9 x 10^8 = 10^95.0 x 10^3 = 10^3
Term
 Distance
Definition
 A change in position (scalar)
Term
 Displacement
Definition
 A change in a given direction from a point of origin (vector)
Term
 Velocity
Definition
 Speed in a particular direction, or change in dispalcement per unit of time (vector)
Term
 Speed
Definition
 Change in distance per unti of time (scalar)
Term
 Constant Velocity (Graph)
Definition
 [image][image]
Term
 Component Vector
Definition
 One of several vectors which can be combined geometrically to yield a resultant vector
Term
 Resultant Vector
Definition
 A vector representing the sum of several vector components
Term
 Instantaneous Velocity
Definition
 Velocity at exact moment
Term
 Vector Problem Solving Strategy (Graphically)
Definition
 1. Make a scale2. Convert to scale3. Draw vectors using ruler and protractor4. Make quadrilateral5. Draw Diagonal6. Measure magnitude and angle of diagonal7. Convert back to scale
Term
 Newton's First Law of Motion
Definition
 An object at rest will remain at rest and an object in motion will remain in motion at CONSTANT VELOCITY and in the SAME DIRECTION unless acted upon be a NET outside forceLaw of Inertia
Term
 Newton's Second Law of Motion
Definition
 The acceleration of an object is directly proportional to the net force acting on that object and inversely proportional to the mass of that objecta=f/m F=ma Fw=mgLaw of Acceleration
Term
 Newton's Third Law of Motion
Definition
 When an object exerts a force on a second object the second object exerts a force of equal magnitude but opposite direction on the first objectLaw of Reciprocal Actions
Term
 Force
Definition
 A push or pulla=F/m F=ma
Term
 Contact Force
Definition
 Involves physical contant; ie Rywass pushes Mr. D
Term
 Field Force
Definition
 Gravity, Electromagnetic, Strong/Weak Nuclear Force
Term
 Newtons
Definition
 kgm/s^2 Force in MKS
Term
 Dynes
Definition
 Force in CGS
Term
 Energy
Definition
 Ability to do work (joules)W=Fd P=W/t
Term
 Frame of Reference
Definition
 Any system for specifying the precise location of objects in space
Term
 Range
Definition
 The displacement in the horizantal direction of a projectile
Term
 Equilibrant Force
Definition
 A force of equal magnitude but opposite direction as another force or the resultant of several other forces
Term
 Crane
Definition
 Tie Cable, Boom, Load CableTie and Boom are always greater than the load
Term
 Friction
Definition
 A force that resists motion or tendency of 2 objects that are in contact
Term
 Static/Starting Friction
Definition
 Friction between 2 nonmoving objects
Term
 Kinetic Friction
Definition
 Friction between 2 moving objectsSliding and Rolling Friction
Term
 Is Friction Dependent on Surface Area?
Definition
 No
Term
 Starting/Sliding Friction is directly proportional to...
Definition
 the force pushing them together
Term
 Friction acts...
Definition
 parallel to the surfaceopposite to motion or tendency of motion
Term
 Sliding Friction is ___________ Starting Friction
Definition
 Less than or equal to
Term
 Coefficient of Friction
Definition
 The ratio of the frictional force between 2 objects and the normal (perpendicular) foce pushing the objects together
Term
 Parallel Force
Definition
 Fwsinx
Term
 Normal Force
Definition
 Fwcosx
Term
 Work
Definition
 W=Fd =Nm =kgm^2/s^2=Joule
Term
 Gravitational Potential Energy
Definition
 Stored Energy due to position, distance above Earth's surface PEg=mgh
Term
 Elastic Potential Energy
Definition
 Energy Stored due to the stretching or compressing of a springPEe=(1/2)kd^2
Term
 Types of Inclined Plane
Definition
 Wedge and Screw
Term
 Types of Lever
Definition
 Wheel & Axel and Pulley
Term
 Equations to Know
Definition
 Vf=Vo+at               Vf=√Vo2+2ax             x=Vot+½at2   x=Vt                         t=√(2x/a)                   9.8k=N   F=ma                          Fw=mg                      W=Fd   FN=FwcosØ                 FP=FwsinØ   μ=Ff/FN                            μ=tanØ
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