Practice: Elastic Potential Energy and Conservation of Energy

A particle of mass 3 kg is attached to end 𝑃 of a light elastic spring 𝑃𝑄 of natural length 0.5 m and modulus of elasticity 41 N. The spring rests on a smooth horizontal plane with end 𝑄 fixed. The particle is held at rest and then released. Find the initial acceleration of the particle if 𝑃𝑄=1.1m initially. Take 𝑔=9.8/ms.


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