Work, Power and EnergyHard

Question

A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distsnce d. The net work done in the process is

Options

A.mg(h + d) - kd2
B.mg(h - d) - kd2
C.mg(h - d) + kd2
D.mg(h + d) + kd2

Solution

       
Gravitational potential energy of ball gets convered into elastic potential energy of the spring.
mg(h + d) = kd2
Net work done = mg(h + d) = kd2 = 0

Create a free account to view solution

View Solution Free
Topic: Work, Power and Energy·Practice all Work, Power and Energy questions

More Work, Power and Energy Questions

A heavy nucleus at rest breaks into two fragments which fly off with velocities 8 : 1. The ratio of radii of the fragmen...Kinetic energies of two bodies of 1 kg and 4 kg are same. The ratio of their momentam is :-...The work done against gravity in taking 10 kg. mass at 1 m height in 1 sec. will be :-...A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate...A uniform chain of length L and mass M is lying on a smooth table and of its length is hanging down over the edge of the...