# Shared Flashcard Set

## Details

Schweiger Physics-H Semester I
Formulas, definitions, and other physics stuff from Peggy Schweiger's Honors Physics class for the semester one exam.
51
Physics
12/13/2006

Term
 Vector
Definition
 Something that has magnitude (a number) and direction.
Term
 Scalar
Definition
 Has a magnitude (number) only.
Term
 Position
Definition
 Separation between an object and a referency point.
Term
 Instantaneous Velocity
Definition
 velocity (or speed) at that instant of time, or, it can be defined as the average velocity (or speed) over an infinitesimally short time interval (average speed and velocity are always the same value)
Term
 Distance/Displacement formula:
Definition
 d=vt
Term
 SI unit for speed or velocity:
Definition
 m/s
Term
 Acceleration due to gravity:
Definition
 9.8 m/s2
Term
 Acceleration formula:
Definition
 a = Vf-Vi t
Term
 Formula for final velocity:
Definition
 Vf=vit
Term
 Distance formula with acceleration:
Definition
 d=vit+(1/2)at2
Term
 Formula for final velocity squared:
Definition
Term
 Inertia
Definition
 a measure of how an object resists changes in motion; it is a measure of an object’s mass
Term
 Newton's first law:
Definition
 An object in motion/at rest will remain in motion/at rest unless acted on by an outside force.
Term
 Newton's second law:
Definition
 an unbalanced force (or net force, S) causes an object to accelerate; this acceleration is directly proportional to the unbalanced force and inversely proportional to the object’s mass; called the law of acceleration a = SF / m or S F = m a
Term
 Newton's third law:
Definition
 When one object exerts a force on another object, the second object exerts a force on the first object that is equal in magnitude, but opposite in direction; for every action, there is an equal, but opposite reaction; called the law of action-reaction
Term
 Universal gravitational constant:
Definition
 G = 6.67 x 10-11 N m2/kg2
Term
 Formula for tye force of weight:
Definition
 Fw = mg
Term
 Formula for the force of friction:
Definition
 Ff=μFn
Term
 Formula for force:
Definition
 F=ma
Term
 Force of gravity:
Definition
 FG= Gm1m2 d2
Term
 Formula for parallel force:
Definition
 Fp=Fwsinϑ
Term
 Formula for normal force:
Definition
 Fp=Fwcosϑ
Term
 Formula for centripetal force:
Definition
 Fc= mv2 r
Term
 Formula for vertical velocity:
Definition
 Vv=vsinϑ
Term
 Formula for horizontal velocity:
Definition
 Vh=vcosϑ
Term
 The formula for a period:
Definition
 [image]
Term
 The formula for frequency:
Definition
 ƒ = 1/T
Term
 The formula for centripetal acceleration:
Definition
 [image]
Term
 Amplitude
Definition
 the distance from the equilibrium point to the point of greatest displacement
Term
 Momentum, definition and formula:
Definition
 a measure of how hard it is to stop a moving object; it is the product of the object's mass and its velocity; since velocity is a vector, momentum is a vector quantity; symbol is p and SI unit are kg m/sec. The direction of the momentum is the same as that of the velocity. p= m v
Term
 Net force in relation to momentum:
Definition
 ΣF = Δp / Δt
Term
 Definition and formula for impulse:
Definition
 a force exerted over a time interval; symbol is J and SI unit is N sec J = F t
Term
 Impulse in relation to average force, mass and momentum.
Definition
 J = F t = m Δv = Δp
Term
 Law of Conservation of Momentum:
Definition
 the momentum of a closed, isolated system is constant; the sum of the initial momentum of the objects is equal to the sum of the final momentum of the objects Σpi = Σpf
Term
 Formula for work:
Definition
 W = Fd
Term
 Formulas for work input, work output and efficiency in relation to work:
Definition
 Wi = Fappdapp Wo = Fwh eff= Wo/Wi
Term
 Kinetic and Potential Energy formulas:
Definition
 KE = (1/2)mv2 PE = mgh
Term
Definition
 IMA = d / h MA = Fw/Fapp eff=MA/IMA
Term
 SI Unit of Power
Definition
 Watts
Term
 Entropy
Definition
 The disorder of particles in a substance. The higher the temperature, the more disorder.
Term
 Heat, formula and SI Unit:
Definition
 Q = m c ΔT SI Unit: Joule
Term
 Latent heat of fusion:
Definition
 Lf = 3.33 x 105 J/kg
Term
 Latent heat of vaporization:
Definition
 Lf = 2.26 x 106 J/kg
Term
 thermodynamics
Definition
 study of properties of thermal energy ΔS = Q / T
Term
 First law of thermodynamics:
Definition
 ΔU = Q + W
Term
 Formula for expansion:
Definition
 ΔL = αL ΔT
Term
 Formula for volume expansion:
Definition
 ΔV = βV ΔT
Term
 Formula for pressure:
Definition
 P = Fw / A where a is the surface area P = ρgh
Term
 Force of buoyancy:
Definition
 FB = ρgV
Term
 Law of Heat Exchange:
Definition
 Qloss + Qgain = 0
Term
 Bernoulli's Principle:
Definition
 as the velocity of a fluid increases, the pressure exerted by that fluid decreases on top of an airfoil there is low pressure due to high velocity airflow on the bottom of an airfoil there is high pressure due to low velocity airflow
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