MTH5P2B: PURE MATHEMATICS MECHANICS QTN 4

An elastic string has one end attached to a point O fixed on a rough horizontal surface. The other end of the string is attached to a particle of mass 2 kg. The elastic string has natural length 0.8 metres and modulus of elasticity 32 newtons. The particle is pulled so that it is at the point A, on the surface, 3 metres from the point O. What is the elastic potential energy when the particle is at the point A.

 

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