Physics I
About this set
Created by:
me8219 on March 13, 2010
Subjects:
Units and Kinematics, Newtonian Mechanics, Work, Energy and Momentum
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70 terms
Filipino | English |
|---|---|
| SI unit Length |  Meter (m) |
| SI unit Mass | Kilogram (kg) |
| SI unit Force | Newton (N) |
| SI unit Time | Second (s) |
| SI unit Work and Energy | Joule (J) |
| SI unit Power | Watt (W) |
| SI unit Current | Ampere (A) |
| SI unit Temperature | Kelvin (K) |
| SI unit Amt of Substance | Mole (m) |
| SI unit Volume | Liter (L) |
| SI unit subatomic level Length 10^-10 m | Angstrom (A) |
| SI unit subatomic level Length 10^-9 m | Nanometer (nm) |
| SI unit subatomic level Energy | Electron Volt (eV) |
| Multiples Factor 10^9 | giga (G) |
| Multiples Factor 10^6 | mega (M) |
| Multiples Factor 10^3 | kilo (K) |
| Multiples Factor 10^-2 | centi (c) |
| Multiples Factor 10^-3 | milli (m) |
| Multiples Factor 10^-6 | micro (m) |
| Multiples Factor 10^-9 | nano (n) |
| Multiples Factor 10^-12 | pico (p) |
| sin 0 | 0 |
| sin 30 | 1/2 |
| sin 45 | sqrt2/2 |
| sin 60 | sqrt3/2 |
| sin 90 | 1 |
| sin 180 | 0 |
| cos 0 | 1 |
| cos 30 | sqrt3/2 |
| cos 45 | sqrt2/2 |
| cos 60 | 1/2 |
| cos 90 | 0 |
| cos 180 | -1 |
| Given Vector V find x component | v cos theta |
| Given Vector V find y component | v sin theta |
| How do you find the magnitude of the resultant vector and direction of theta if you are given several vectors? | 1. Resolve the vectors using the x and y components 2. Add all the x components together and all the y components together 3. Find the magnitude of the resultant using r=sqrt y^2 + x^2 4. Find the direction of theta using tan theta = y/x |
| Displacement | Vector. Change in an objects position |
| Velocity | Vector. m/s. Change of displacement over change in time |
| Speed | Scalar. Actual distance traveled over change in time |
| Instantaneous speed | Scalar. Magnitude of the instantaneous velocity |
| Instantaneous velocity | Average velocity as the change in time approaches 0 |
| Acceleration | Vector. Change of velocity over change in time |
| Instantaneous acceleration | Average acceleration as change in time approaches 0 |
| Average acceleration | Change in instantaneous velocity over change in time |
| 6 linear motion equations | 1. V=Vin+at 2. lineV=Vin+V/2 3. Vsq=Vin)+2a^2(x-xin) 4. X-Xin=Vint+at^2/2 5. X-Xin=lineVt 6. X=Vxt |
| Weight | Vector. Measure of gravitational force on mass |
| Mass | Scalar. Its the amount of matter an object has |
| Acceleration is in the opposite direction of | initial velocity |
| Newtons First Law | F=ma=0 A body at rest or in constant motion will remain that way unless a force acts on it |
| Newtons Second Law | sumF=ma Force applied to a body will cause the body to accelerate in that direction only if the sum of all forces do not equal zero |
| Newtons Third Law | Fb=-Fa To every action there is an equal and opposite reaction |
| Gravitational Force Equation | F=Gm1m2/r2 |
| What 2 things should be remembered about the gravitational force equation | F is inversely proportional to r2 and if r is halved then F is quadrupled. |
| Translational Motion | Motion where there is no rotation |
| Rotational Motion | Forces applied to an object cause the object to rotate around a fixed point (fulcrum) |
| Torque | Application of force at some distance from a fulcrum generates torque causing the object to undergo rotational motion. |
| Torque equation | t=rFsintheta r is the distance between the fulcrum and point of force, theta is the angle between the F and the lever arm |
| What is the displacement of an object moving in uniform circular motion after the completion of one complete cycle? | Zero |
| In uniform circular motion, what is the magnitude of the tangential force? and why? | Zero because there is no change in speed of the object because its constant. |
| What is the resultant force of an object moving in uniform circular motion? | The radial force because the tangential force is zero |
| In uniform circular motion, acceleration is always in the same direction as the | resultant force |
| Circular motion equation | F=mvsquared/r |
| Centripetal acceleration equation | a=vsquared/r |
| What are the two kinds of friction? | Static friction (not moving) and Kinetic friction (moving) |
| Static friction equation | 0<Fs<MsFn |
| Static friction | occurs between a stationary object and the surface that it rests on |
| Kinetic friction equation | Fk=MkFn |
| Kinetic friction | occurs between a sliding object and the surface that its sliding on |
| How are the Kinetic friction and Static Friction equations different? | The kinetic friction equation has an equal sign the static friction equation has a less than or equal to sign meaning kinetic friction will have constant value for any given combination of coefficient of kinetic friction and normal force |
| Which will have a higher maximum value static friction or constant kinetic friction? | static friction it takes more force to move something than to get an object to slide and keep it sliding |
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