A spring with spring constant k is extended from x=0 to `x=x_(1)`. The work done will be

STATEMENT-1: An elastic spring of force constant k is stretched by a small length x. The work done in extending the spring by a further length x is 2kx^(2) . because STATEMENT-2: The work done in extending an elastic spring by a length x is proportional to x^(2) .

A block of mass 0.1 kg attached to a spring of spring constant 400 N/m is putted rightward from x_(0)=0 to x_(1)=15 mm. Find the work done by spring force.

A spring of force constant 800 N/m has an extension of 5 cm . The work done in extending it from 5 cm to 15 cm is

A block of mass 0.1 kg attached to a spring of spring constant 400 N/m is pulled rightward from x_(0)=0 to x_(1)=15 mm. Find the work done by spring force.