Physics 11 Equations, Formulas, and Data

Physics 11 For constant velocity: Equations, Formulas, and Data Sheet v a d t For constant acceleration: v t v  v0  at 1 d  v0t  at 2 2 Forces: Dynamics 2 v 2  v0  2ad v  v0  d t 2 Fnet  ma In General: Fnet   F   ma Gravity: At the Earth’s surface: Weight=Fg=mg Gravity: In general: Fg  Gm1m2 d2 Hooke’s Law: For elastic Forces: F  kx Friction: Ff = µFN = µmg Momentum: p  mv impulse  Ft  p  mv  vm  mv   m1v1  m2v2  m1v1  m2v2 Percentage error: measured value  true value 100 0 0 true value 1 Energy: Gravitational Potential Energy: E p  mgh Kinetic Energy: 1 Ek  mv 2 2 Conservation of Energy: ΔEk= - ΔEp Work: W = Fd = ΔE Work-Energy Theorem: Wnet = Fnet d = ΔEk P W E   Fv t t Ebefore  Eafter  E pi  E ki  E pf  E kf W = Fdcosθ Eh  mcT efficiency  E  mc2 Eout P  100%  out  100% Ein Pin Waves and Light: T 1 f v  f M hi d  i h0 d0 v  332  0.6T m / s 1 1 1   f di d 0 Centre of curvature: c2f n vvacuum vmedium n1 sin  1  n2 sin  2 Radioactive decay: n 1 N  N0   , where n=t/τ and t  time elapsed and τ  1/2 life 2 Relativity: t t0 1 v c2 2 L  L0 1  v2 c2 m mo v2 1 2 c 2