The oscillating objects we’ve looked at up to now all vibrate with a rather special pattern or waveform. This therefore lowers the frequency of its oscillations. The greater the inertia of an oscillating object the greater the time period. This increases the time period of the oscillation. An increased inertia means that the springs will not be able to make the mass change direction as quickly. Note – massive objects have inertia even in outer space where they have no weight!). (BTW In this example we have switched off gravity. reluctance to accelerate and decelerate) of the object. What happens if we change the size of the mass?Īn increase in mass increases the inertia (reluctance to change velocity i.e. If the mass is moved away from the equilibrium position the restoring forces provided by the springs will make the mass oscillate back and forth in a similar manner to the playground swing example shown on the previous page. Imagine a mass held between two springs as shown in the animation below. Let’s go back to thinking about masses and springs.
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