AP Physics C: Mechanics / Unit 7: Oscillations
7.1 Defining Simple Harmonic Motion (SHM)
Notes
SHM happens when the restoring force is proportional to displacement and opposite to it: $F=-kx$.
- Examples: mass on a spring, small-angle pendulum.
- Acceleration is greatest at the ends; speed is greatest at equilibrium.
Practice
In SHM, acceleration is greatest:
Biggest restoring force.
At the equilibrium position, a mass on a spring has:
All energy is kinetic.
Which is required for SHM?
$F=-kx$.
SHM satisfies which differential equation?
Acceleration proportional to $-x$.
Ready for more? Take the Unit 7 test.