Simple Harmonic Motion II (SHM)

Physics SSS2 First Term

Sub Theme: Interaction of matter, space and time

WEEK 10

Simple Harmonic Motion II (SHM)

Performance Objectives

Students should be able to;

1. Calculate the energy in the system

2. Explain forced vibration and resonance.

Forced Vibration and Resonance

Content

A system performing SHM gradually loses its energy due to friction within its parts and air resistance. The amplitude of such a motion gradually becomes smaller and smaller with time until it decreases eventually to zero. Such a motion is said to be damped. Without damping the motion is said to be free and the amplitude remains constant with time.

In order to maintain the free oscillation of a vibrating body for a long time, an…