Question 221: Properties of Matter

Question

A wire fixed at the upper end stretches by length $$l$$ by applying a force $$F.$$ The work done in stretching is

Accepted Answer

Work done by constant force in displacing the object by a distance $$\ell $$.
= Potential energy stored
$$ = {1 \over 2} 	imes $$ Stress $$ 	imes $$ Strain $$ 	imes $$ Volume
$$ = {1 \over 2} 	imes {F \over A} 	imes {l \over L} 	imes AL$$
$$ = {1 \over 2}Fl$$

Answer

$$2Fl$$

Answer

$$Fl$$

Answer

$${F \over {2l}}$$

Answer

$${{Fl} \over 2}$$

Properties of Matter

A wire fixed at the upper end stretches by length $l by applying a force F.$ The work done in stretching is

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