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| An established norm or requirement. A controlled artifact used for calibration. |
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| Measurement system based in meters, kilgrams, and seconds; ie newton. |
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| International System of Units (metric system) |
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| Measurement system based in centimeters, grams, seconds |
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| Measurement System based in feet, slugs, seconds |
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Measure physical quantity.
One of basic 7 units of measurement. |
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Measure physical quantity.
Based on several fundamental units. |
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9,000,000 = 1 sf
.020750 = 5 sf |
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| Measurement which requires magnitude only (Speed and distance) |
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| Measurement which requires both magnitude and direction (Velocity) |
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| Degree of Precision of Scientific Equipment |
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| How close several measurements made in the same manner are to each other |
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| How close a measurement is to an accepted value |
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Measurement of quantity.
Amount of matter in an object. |
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Measurement of quantity.
Force which is the measure of the product of the mass of an object and the acceleration due to gravity. |
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Energy due to motion
KE=(1/2)mv^2 |
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9.8 x 10^8 = 10^9
3.9 x 10^8 = 10^9
5.0 x 10^3 = 10^3 |
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| A change in position (scalar) |
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| A change in a given direction from a point of origin (vector) |
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| Speed in a particular direction, or change in dispalcement per unit of time (vector) |
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| Change in distance per unti of time (scalar) |
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| Constant Velocity (Graph) |
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| One of several vectors which can be combined geometrically to yield a resultant vector |
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| A vector representing the sum of several vector components |
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| Vector Problem Solving Strategy (Graphically) |
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Definition
1. Make a scale
2. Convert to scale
3. Draw vectors using ruler and protractor
4. Make quadrilateral
5. Draw Diagonal
6. Measure magnitude and angle of diagonal
7. Convert back to scale |
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| Newton's First Law of Motion |
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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 force
Law of Inertia |
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| Newton's Second Law of Motion |
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The acceleration of an object is directly proportional to the net force acting on that object and inversely proportional to the mass of that object
a=f/m F=ma Fw=mg
Law of Acceleration |
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| Newton's Third Law of Motion |
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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 object
Law of Reciprocal Actions |
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| Involves physical contant; ie Rywass pushes Mr. D |
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| Gravity, Electromagnetic, Strong/Weak Nuclear Force |
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Ability to do work (joules)
W=Fd P=W/t |
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| Any system for specifying the precise location of objects in space |
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| The displacement in the horizantal direction of a projectile |
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| A force of equal magnitude but opposite direction as another force or the resultant of several other forces |
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Tie Cable, Boom, Load Cable
Tie and Boom are always greater than the load |
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| A force that resists motion or tendency of 2 objects that are in contact |
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| Friction between 2 nonmoving objects |
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Friction between 2 moving objects
Sliding and Rolling Friction |
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| Is Friction Dependent on Surface Area? |
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Definition
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| Starting/Sliding Friction is directly proportional to... |
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| the force pushing them together |
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parallel to the surface
opposite to motion or tendency of motion |
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| Sliding Friction is ___________ Starting Friction |
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| The ratio of the frictional force between 2 objects and the normal (perpendicular) foce pushing the objects together |
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W=Fd
=Nm
=kgm^2/s^2=Joule |
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| Gravitational Potential Energy |
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Definition
Stored Energy due to position, distance above Earth's surface
PEg=mgh |
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Energy Stored due to the stretching or compressing of a spring
PEe=(1/2)kd^2 |
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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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