PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 08. Equilibrium
| 5.1. | The First Condition | ||
| 1. | Net force is zero | ||
| 2. | Normal forces again | ||
| 5.2. | The Second Condition | ||
| 1. | Torque:
| ||
| a rotational force about an axis | |||
| 2. | Definition: Fd sin a | ||
| 3. | Units: Newton*meters | ||
| 4. | Net torque = sum of all torques | ||
| 5. | Equilibrium: Net torque = zero | ||
| 6. | Ambiguity of axis of rotation | ||
| 5.3. | Center of Gravity | ||
| 1. | Definition: rotational equilibrium under support | ||
| 2. | Relation to 5.2.2 | ||
| 3. | Symmetric objects | ||
| 5.4. | Stability | ||
| 1. | Stable Equilibrium | ||
| 2. | Unstable Equilibrium | ||
Review Questions are at the end of the next lecture.
Lecture 09: Statics Applications and Elasticity