PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 17. Angular Energy and Momentum.
9.4. | Rotational Energy | |
1. | Work = τθ = Iαθ | |
2. | KE = Iω 2/ 2 | |
3. | Rolling things: PE exchanged with sum of two KEs (linear+angular), and linear v = rω | |
9.5. | Angular Momentum | |
1. | Definition: L = Iω | |
2. | Direction of vectors L, ω: perpendicular to rotation plane with right hand rule | |
3. | Total always conserved |