FA09_Formulas - Physics 211 Kinematics v = v0 + at r = r0 +...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 211 Formula Sheet Fall 2009 Kinematics v = v 0 + a t r = r 0 + v 0 t + at 2 /2 v 2 = v 0 2 + 2a(x-x 0 ) g = 9.81 m/s 2 = 32.2 ft/s 2 Uniform Circular Motion a = v 2 /r = ω 2 r v = ω r ω = 2 π /T = 2 π f Dynamics F net = m a = d p /dt F A,B = - F B,A F = mg (near earth's surface) F 12 = -Gm 1 m 2 /r 2 (in general) (where G = 6.67x10 -11 Nm 2 /kg 2 ) F spring = -kx Friction f = μ k N (kinetic) f μ S N (static) Work & Kinetic energy W = F ds W = F S = FS cos θ (constant force) W grav = -mg Δ y W spring = - k(x 2 2 - x 1 2 )/2 K = mv 2 /2 = p 2 /2m W NET = Δ K Potential Energy U grav = mgy (near earth surface) U grav = -GMm/r (in general) U spring = kx 2 /2 Δ E = Δ K + Δ U = W nc Power P = dW/dt P = F v (for constant force) System of Particles R CM = Σ m i r i / Σ m i V CM = Σ m i v i / Σ m i A CM = Σ m i a i / Σ m i P = Σ m i v i Σ F EXT = M A CM = d P /dt Impulse I = F dt Δ P = F av Δ t Collisions: If Σ F EXT = 0 in some direction, then P before = P after in this direction: Σ m i v i (before) = Σ m i v i (after) In addition, if the collision is elastic: * E before = E after * Rate of approach = Rate of recession
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online