Physics Exam 2

Physics Exam 2

Circular Motion
1. Acceleration is not constant
2. analyzed in terms of accel and Forces
3. Uniform circular motion
  1. Direction is always changing
  2. vector is always tangent to circle
  3. Period of motion
    1. T=2pi(r)/v
  4. centripetal acceleration
    1. ac=v^2/r
4. Force directed toward center of circle
5. Tbottom=m(v^2/r +g)
6. Ttop=m(v^2/r -g)
Gravitation
1. Fgrav=Mperson(g)=GMpersonMearth/r^2earth
Work and Energy
1. W=F(displacement)
2. Newtons x meter= Joule
3. Kinetic energy
  1. 1/2mv^2
4. potential energy
  1. W=mgh
  2. PEchange=PEfinal-PEinitial=-W
5. mechanical energy
  1. sum of potential and kinetic energies
6. Power
  1. Pave=W/t
Momentum
1. p=mv
impulse
1. F(change in t)=change in momentum
collisions
1. elastic
  1. energy conserved
2. inelastic
  1. kinetic energy is lost
Rotational Dynamics
1. wf=wi+at
2. theta(final)=theta)initial)+wt+1/2at^2
3. wf^2=wi^2+2a(thetaf-thetai)
4. theta=s/r
5. angular velocity
  1. w ave= change in theta/change in t
6. linear and angular accelerations
  1. at=ar

Resource summary

	Created by wshield almost 11 years ago