# Shared Flashcard Set

## Details

Physics
Final
72
Physics
12/17/2006

Term
 Mega (M)Kilo (k)NoneCenti (c)Milli (m)Micro (u)
Definition
 10^610^310^010^-210^-310^-6
Term
 Distance Traveled
Definition
 How long something moves measured along the path.
Term
 Displacement
Definition
 How far did something get from the starting point
Term
 Vector
Definition
 A quanitiy where direction is important
Term
 Scaler
Definition
 A quantity where direction is not important
Term
 Convert 3,500 Km to Mm
Definition
 3.5 Mm
Term
 Convert 4.2 Km to cm
Definition
 420,000
Term
 Convert .00489 Kg to g
Definition
 4.89 g
Term
 Convert 72 inches to feet
Definition
 72 in. (1ft/12in) = 72/12 = 6ft
Term
 When do you use the pacific rule?
Definition
 When there is a decimal point
Term
 What is the Pacific rule?
Definition
 You start on the left, and once you reach the first non-zero you count it and everything after it as a sig. dig.
Term
 When do you use the Atlantic rule?
Definition
 When there is no decimal point.
Term
 What is the Atlantic rule?
Definition
 You start on the right of the number, and once you reach the first non-zero you count it and everything after it as a sig. dig.
Term
 How man Sig. Dig.'s are in 1,000.8?
Definition
 5 sig. dig.'s
Term
 How many Sig. Dig.'s are in 80?
Definition
 1 Sig. Dig.
Term
 How many Sig. Dig.'s are in .00260?
Definition
 3 Sig. Dig.'s
Term
 How many Sig. Dig.'s are in 25,000?
Definition
 2 Sig. Dig.'s
Term
 How many Sig. Dig.'s are in 4,020?
Definition
 3 Sig. Dig.'s
Term
 How many Sig. Dig.'s are in 4.080?
Definition
 4 Sig. Dig.'s
Term
 What is the rule when multiplying and dividing with Sig. Dig.'s?
Definition
 When you multiply you are only allowed to keep the smallest # of sig. dig.'s present in one of the numbers being multiplied or divided.
Term
 What is the rule when adding or sbtracting with Sig. Dig.'s?
Definition
 When adding or subtracting Sig. Digs. You use the number of sig. digs. to the right of the decimal. Line up and then + or - and cut of the extra. (Do math first; round last.)
Term
 What is the product of 4.080*2.0?
Definition
 8.2 +/- .1
Term
 Write 156.90 in proper scientific notation.
Definition
 1.569*10^2
Term
 Write 0.00089 in proper scientific notation.
Definition
 8.9*10^-4
Term
 Expand 1.23*10^6 into ordinary notation.
Definition
 1,230,000
Term
 Expand 9.09*10^-5 into ordinary notation.
Definition
 9.09e-05
Term
 What is the equation for velocity?
Definition
 Displacement/Time
Term
 What is the equation for speed?
Definition
 Distance Travled/Time elapsed
Term
 Is velocity vector or scaler?
Definition
 Vector
Term
 Is speed a vector or scaler?
Definition
 scaler?
Term
 What is aceleration?
Definition
 A change in velocity. (Speed up, slow down, turning).
Term
 What is the equation for acceleration?
Definition
 (Vf - Vo)/(T)
Term
 What are the three kinematic equations?
Definition
 Delta X = Vot + 1/2 at^2Vf = Vo + atVf^2 = Vo^2 + 2a Delta X
Term
 When do you use the kinematic equations?
Definition
 When the acceleration is constant.
Term
 What is the acceleration of gravity?
Definition
 - 9.8 m/s^2
Term
 What is pythagorean's theorum?
Definition
 a^2 + b^2 = c^2
Term
 What does SOHCAHTOA stand for?
Definition
Term
 What is a component?
Definition
 The part of a vector that runs parrallel to an axis.
Term
 How do you find the horizontal component?
Definition
 VX = V Cos Theda
Term
 How do you find the vertical component?
Definition
 Vy = V Sin theda
Term
 In projectile motion what stays the same the whole time?
Definition
 Acceleration. ax = 0 ay = -9.8 m/s^2
Term
 What is the Net Force?
Definition
 The sum of all forces.
Term
 What is Newton's First Law of Motion?
Definition
 The Law of Inertia - If there is no EF acting on an object, then it will not accelerate (speed up, slow down, turn).
Term
 What is Newton's Second Law?
Definition
 EF = maNet Force = (mass)(acceleration)
Term
 What is Newton's Third Law of Motion?
Definition
 If an object exerts a force on a second object, then the second object exerts a force back on the first object. The forces are equal in magnitude, but opposite in direction.
Term
 What is mass?
Definition
 Measure of Inertia. (Kg)
Term
 What is weight?
Definition
 A force of gravity on an object down. w=mg Weight = (Mass)(Gravity)
Term
 When you have a frictionless ramp, what is the force going into the ramp?
Definition
 mg Cos Theda
Term
 When you have a frictionless ramp, what is the force going down the ramp?
Definition
 mg Sin Theda
Term
 What is friction?
Definition
 Two forces that oppose the sliding of two objects past eachother.
Term
 How many types of friction are there and what are they?
Definition
 2 - Static and Kinetic.
Term
 What kind of friction do you use if you want to get something started?
Definition
 Static Friction.
Term
 What kind of friction do you use if you want to keep an object moving?
Definition
 Kinetic Friction.
Term
 What is the coefficient of friction?
Definition
 The slickness of it.
Term
 What is the equation for Static Friction?
Definition
 Ffr
Term
 What is us?
Definition
 The Coefficient of static friction.
Term
 What is the equation for Kinetic Friction?
Definition
 Ffr = ukFN
Term
 What is uk?
Definition
 The coefficient of kinetic friction.
Term
 If you want to accelerate, what equation do you use?
Definition
 EF = ma.........F-Fr=ma
Term
 What equation do you use to find the force of gravity?
Definition
 FG = (Gm1m2)/(r^2)
Term
 What does FG stand for?
Definition
 The attraction between two object.
Term
 What does G stand for?
Definition
 Universal Gravitational Constant.
Term
 What is the Universal Gravitational Constant?
Definition
 6.67 * 10^-11 N
Term
 What happens if you doube the mass?
Definition
 The force doubles.
Term
 What happens if you doubble both the mass and the radius?
Definition
Term
 What is Uniform Circular Motion?
Definition
 Motion in a circle at a constant speed.
Term
 What is the equation for Centripetal Acceleration (ac)?
Definition
 (V^2)/(r)
Term
 What is the equation for Centripetal Force?
Definition
 FC = m (V^2/r)
Term
 How do you find the circumphrence of a circle?
Definition
 2 pi r
Term
 m = 2,000 kg; r = 10 m; V = 10 m/s; What is the EF?
Definition
 2,000 (102/10) = 20,000
Term
 The slowest you can go on a loop the loop is represented by what equation?
Definition
 V = (square root of:) rg
Term
 The maximum "safe speed" you can go while making a turn is represented by what equation?
Definition
 V = (square root of:) usrg
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