A support cable on a bridge has a cross-sectional area of 0.0067m2 and a length of 24 m. It ia made of a high stress material of young’s modulus 2.8x1011 Pa. The tension in the cable is 720 Kn. Calculate the extension of the cable and the strain energy stored in the cable.
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Potential energy is the energy possessed by the body by virtue of its position or configuration.
Consider a body of mass m at a height 'h' from the ground.
The amount of work done to raise this body to this height h against the force of gravity:
W=F×h where F is the force of gravity .
W=mgh
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