7.1.A—Describe simple harmonic motion

Describe simple harmonic motion.

• Simple harmonic motion is a special case of periodic motion.
• SHM results when the magnitude of the restoring force exerted on an object is proportional to that object’s displacement from its equilibrium position. Derived equation: x
  • i. A restoring force is a force that is exerted in a direction opposite to the object’s displacement from an equilibrium position.
  • ii. An equilibrium position is a location at which the net force exerted on an object or system is zero.
  • iii. The motion of a pendulum with a small angular displacement can be modeled as simple harmonic motion because the restoring torque is proportional to the angular displacement. TOPIC 7.1 Defining Simple Harmonic Motion (SHM)