2. A certain wire of length L, cross-sectional area A is extended by an amount ‘e’
by a force F. Given that the young’s modulus of the material of the wire is E,
Show that the;
a. Energy stored in the wire is given by the expression (5)
b. Energy per
unit volume, Ev = x (strain) 2 (5)
3. A tensile force of 180 N when applied to a steel wire of length 2 m and cross
sectional area 0.3 mm 2 extends the wire by 0.6 cm. calculate
a. Young’s modulus of the elasticity of the wire. (3)
b. The energy stored in the wir e.
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