Question

2(a). Define strain energy.
2(b). Write an expression for the energy stored, E, in a stretched wire of original length, l, cross-sectional area, A, extension, e, and Young's modulus, Y, of the material of the wire.

Accepted Answer

(a) Strain energy is the energy (potential energy) stored in a material or object when it is deformed, stretched or compressed by an applied force.
(b) E = YAe²/2l.

WAEC Physics 2023 Theory — Question 2

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