Conservation of Energy
When an object is both translating and
rotating, we need to incorporate the kinetic
energy of both of these motions, K = ½ mv2 + ½
Iω2, into energy conservation.
With this more complete form of kinetic energy, we can still apply: DOEL for solving energy
- Define/draw system: Include both objects
- 0 Choose
consistent zero of the potential energy.
- Energy conservation
Ef = Ei
Kf + Uf = Ki +
Ui - Uf = Kf -
- Δ U = Δ K
- Losses: Incorporate
Ef = Ei - losses