296492
Physics Exam 2
- Circular Motion
- Acceleration is not constant
- analyzed in terms of accel and Forces
- Uniform circular motion
- Direction is always changing
- vector is always tangent to circle
- Period of motion
- T=2pi(r)/v
- T=2pi(r)/v
- centripetal acceleration
- ac=v^2/r
- ac=v^2/r
- Direction is always changing
- Force directed toward center of circle
- Tbottom=m(v^2/r +g)
- Ttop=m(v^2/r -g)
- Acceleration is not constant
- Gravitation
- Fgrav=Mperson(g)=GMpersonMearth/r^2earth
- Fgrav=Mperson(g)=GMpersonMearth/r^2earth
- Work and Energy
- W=F(displacement)
- Newtons x meter= Joule
- Kinetic energy
- 1/2mv^2
- 1/2mv^2
- potential energy
- W=mgh
- PEchange=PEfinal-PEinitial=-W
- W=mgh
- mechanical energy
- sum of potential and kinetic energies
- sum of potential and kinetic energies
- Power
- Pave=W/t
- Pave=W/t
- W=F(displacement)
- Momentum
- p=mv
- p=mv
- impulse
- F(change in t)=change in momentum
- F(change in t)=change in momentum
- collisions
- elastic
- energy conserved
- energy conserved
- inelastic
- kinetic energy is lost
- kinetic energy is lost
- elastic
- Rotational Dynamics
- wf=wi+at
- theta(final)=theta)initial)+wt+1/2at^2
- wf^2=wi^2+2a(thetaf-thetai)
- theta=s/r
- angular velocity
- w ave= change in theta/change in t
- w ave= change in theta/change in t
- linear and angular accelerations
- at=ar
- at=ar
- wf=wi+at
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