# Shared Flashcard Set

## Details

AP Physics formulas: Mechanics
All the formulas found on the AP refrence table
20
Physics
01/24/2009

Term
 Horizontal Distance Formula
Definition
 D = vct
Term
 In kinematics, Final Velocity Equals....?
Definition
 V f  = V i + at
Term
 Distance equals .....? (but only when there is a constant acceleration)
Definition
 d = ½ (V f + V i )t
Term
 In kinematics, V f ² equals....?
Definition
 V f ² = V i ² +2ad
Term
 In kinematics, D equals....?
Definition
 D = v it + ½at ²
Term
 Hooke's Law
Definition
 F s = -k ▲x K = Spring constant (N/m)X = Compression/ Elongation or Change in length from equilibrium
Term
 The amount of energy stored in a spring equals _____?
Definition
 The amount of work done to compress the spring  ½ kx2 = Uspring
Term
 Kinetic Energy Formula
Definition
 KE = 1/2 (mv2)
Term
 Potential Energy Formula
Definition
 PE = mgh  m = massg = grav. accelerationh = height of object above ground
Term
 Conservation of Energy Formula (Kinetic and Potential energy)
Definition
 Etotal = KE + PE or  KE initial + PE initial = KE final + PE final
Term
 Work Formulas
Definition
 W = ▲ E E = energy or  W = Fd cos θ
Term
 Conservation of momentum Formula
Definition
 Ma Va + Mb Vb = Ma Va ' + Mb Vb '  M = massV = Velocity
Term
 Perfectly Inelastic Collision Formula
Definition
 V' a = V' b = V' Ma Va + Mb Vb = (Ma + Mb)V'
Term
 Impulse Formula
Definition
 J = F ▲T = ▲ P or  F ▲ T = M ▲ V  J = ImpulseF = ForceT = time P = Momentum M = MassV = Velocity
Term
 Universal Law of Gravitation
Definition
 F = G  (M1 M2 / r2) F= grav force of attraction btwn 2 bodies G = Grav. Constant (6.67 x 10 -11 Nm2 / kg2)m1 = mass of one gravitatonal bodym2 = mass of other grav bodyr= distance btwn centers of the two bodies
Term
 Kepler's 3rd law
Definition
 T12/ T22 = r13 / r23 T = period of a planetr= average distance  Note: in order ot use this the two objects must be orbiting the same object =O
Term
 Orbital Period of a Planet
Definition
 T = (2 pi r) / v T = orbitial period of a planetV = average velocity of said planetr = the avg. distance btwn the planet and the central grav. body
Term
 Centripetal Force
Definition
 Fc = mv2 / r Fc = Fnet for object in circular motion
Term
 Velocity on a banked curve
Definition
 V = square root (rg tan θ)   θ = angle the bank makes with the ground
Term
 Torque
Definition
 Torque = Fr sin θ r = distance from pivot point to where the force is being applied   θ = angle btwn the force vector and radius vector
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