Pendulums.

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Presentation transcript:

Pendulums

Pendulum Phet Investigation

A SIMPLE PENDULUM A string with a mass at the end which is free to swing

LENGTH OF THE PENDULUM Distance from the point of suspension to the mass It is denoted by L

Equilibrium OF THE PENDULUM “B” is the equilibrium position A and C are the extreme points

OSCILLATION – movement back and forth The motion of the mass from its extreme position A to C and back to A

Period of a Pendulum Period (T)– amount of time to complete one oscillation Length of string (L) Acceleration due to gravity (g) =9.8 m/s2 𝑇=2π 𝐿 𝑔

What about Mass?? The period of a pendulum DOES NOT depend on the mass that is swinging!

Resonance When a force is applied to an oscillating object at time intervals equal to the period Increases amplitude Examples: pumping on a swing, jumping rhythmically on a trampoline, rocking your car back and forth to free it from a snow bank