Simple Harmonic Motion - A Level Physics Definition

Reviewed by: Leander Oates

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What is simple harmonic motion?

In A Level Physics, simple harmonic motion (SHM) is a type of periodic motion where an object oscillates back and forth around an equilibrium position, experiencing a restoring force that is directly proportional to its displacement from that position and opposite in direction.

In SHM, the motion is sinusoidal in time and is characterised by constant amplitude, frequency, and period.

The acceleration of the object is always directed towards the equilibrium position and is proportional to the negative of the displacement.

SHM is fundamental in understanding systems such as springs, pendulums, and other oscillatory phenomena.

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Leander Oates

Reviewer: Leander Oates

Expertise: Senior Physics Content Creator

Leander graduated with First-class honours in Science and Education from Sheffield Hallam University. She won the prestigious Lord Robert Winston Solomon Lipson Prize in recognition of her dedication to science and teaching excellence. After teaching and tutoring both science and maths students, Leander now brings this passion for helping young people reach their potential to her work at SME.

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