A moving railway compartment has a spring of constant k fixed to its front wall. A boy stretches this spring by distance x and in the mean time the compartment moves by a distance s. The work done by boy w.r.t. earth is

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 man stretches a spring attached to the front wall of railway carriage over a distance l in a uniformly moving train. During this time the trai covers a distance L. Does the work done by the man depend on the coordinate system related to the earth or the train? the man moves opposite to the direction of motion of the train as he stretches the spring.

A spring is stretched by distance x and then compressed to same distance from its original length. The work done by the spring force is (k=spring constant)

A spring is stretched by distance x and then compressed to same distance from its original length. The work done by the spring force is (k=spring constant)

Two equal masses are attached to the two ends of a spring of spring constant k. The masses are pulled out symmetrically to stretch the spring by a length x over its natural length. The work done by the spring on each mass is

Two equal masses are attached to the two ends of a spring of spring constant k. The masses are pulled out symmetrically to stretch the spring by a length x over its natural length. The work done by the spring one each mass is

Two equal masses are attached to the two ends of a spring of spring constant k. The masses are pulled out symmetrically to stretch the spring by a length x over its natural length. The work done by the spring one each mass is

Two equal masses are attached to the two ends of a spring of spring constant k . The masses are pulled a part symmetrically to stretch the spring by a length x over its natural length. The work done by the spring on each mass is.