A spring of force constant K is first stretched by distance a from its natural length and then further by distance b. The work done in stretching the part b is

A spring of force constant K is first stretched by distance a from its

1.	A spring of force constant K is first stretched by distance a from its natural length and then further by distance b. The work done in stretching the part b is
Answer» `(1)/(2)KA(a-b)` `(1)/(2)Ka(a+b)` `(1)/(2)KB(a-b)` `(1)/(2)Kb(2a+b)` ANSWER :D

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A spring of force constant K is first stretched by distance a from its natural length and then further by distance b. The work done in stretching the part b is

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