Work, Energy an...

A spring 40 mm long is stretched by the application of a force. If 10 N force required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is

A body of mass 3 kg is under a force, which causes a displacement in it given by S = t³/3 (in m). Find the work done by the force in first 2 seconds

The force constant of a wire is k and that of another wire is 2k. When both the wires are stretched through same distance, then the work done

A body of mass 0.1 kg moving with a velocity of 10 m/s hits a spring (fixed at the other end) of force constant 1000 N/m and comes to rest after compressing the spring. The compression of the spring is

A mass of 0.5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant k = 50 N/m. The maximum compression of the spring would be

A spring with spring constant k when stretched through 1cm, the potential energy is U. If it is stretched by 4 cm. The potential energy will be

A spring with spring constant k is extended from x = a to x = x₁. The work done will be

If a long spring is stretched by 0.02 m, its potential is U. If the spring is stretched by 0.1 m, then its potential energy will be

The spring extends by x on loading, then energy stored by the spring is (if T is the tension in spring and k is spring constant)