## Phyiscs

##### Created by:

thingmajig  on December 13, 2011

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# Phyiscs

 forceany influence that tends to accelerate an object
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#### Math / Symbols

force any influence that tends to accelerate an object
work product of the force on an object nd the direction through which the object is moved
trajectory path of a projectile
power rate of doing work
resultant a vector that is the sum of two or more other vectors
projectile object that is shot, launched INTO the air
support force force that completly balances the wight of an object
net force combination of all forces acting on an object
vector a straight line segment whose length is magnitude and whose orientation in space is direction
internal force a force that occurs w/in the system
potetional energy energy of position, usually realted to the relative position of two things
kilogram SI unit for mass
normal force for an object resting on a horizontal surface, the upward force that balances the weight of the object
mass measure of an object's inertia
momentum product of the mass nd the velocity of an object
newton SI unit of force, a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram
inerita tendency of an object to resist any change in its motion
kinetic energy energy of motion, equal to half the mass multiplyied by the speed squared
pressure ratio of force per area
friction force that acts to resist the relative motion
weight force on a body due to the gravitational attraction of another body
accleration rate at which velocity changes
impulse quanity force X time interval
calculate power Power = Work/Time
calculate potential energy weight X height
calculate average speed Vi = Vf - AT
calculate net force Fnet = MA
calculate wieght of a mass W = mg
calculate work work = force X distance
calculate pressure Pressure = F/A
calculate kinetic energy KE = 1/2mv²
calculate momentum p = m/v
calculate acceleration A = Vf - Vi / T
Law of Inertia an object stays in rest, unless it is compelled to change that state by a net force exerted upon it
Third Law of Motion for every action there is an equal nd opposite reaction
Law of Conservation of Momentum in the absence of an external force, the momentum of a system remains unchanged
speed nd velocity speed- a mesure of how fast something is moving
velocity- speed nd direction
why do forces occur in pairs there is never a single force
Copernicus Theory planets revolved around the sun
accleration due to gravity g = 10m/s²
angle at which make a projectile go the farthest 45°
mass vs. weight Mass is the amount of matter in an object
Weight is the force of gravity on a mass
difference between instantious nd average speed instantanious speed is speed at any instant
average speed is path distance divided by the interval

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