What is the work done in lifting water from a well 6 m deep using a bucket of mass 0.5 Kg and volume 2.5 liters?

The mass of a spherical planet is 5 times the mass of the earth but it’s diametre is the same as that of the earth, how much work is done in lifting a stone of mass 3 kg through a distance of lm on the planet.

What is the work done in dragging a stone of mass 100kg up an inclined plane 1 in 100 through a distance of 10 m?

A copper wire 2 m long and having a diameter of 2mm is suspended from a rigid support . The wire is stretched by a load of 5 kg . Find the work done in stretching the wire and the strain energy per unit of its volume. Y = 12 xx 10^10 N/m^2 and g= 9.8 m/s^2 .

What is the force constant of a spring which stretched by 0.1m when a mass of 0.5kg is hung from it ?

A tank of 2xx2xx3 is to be filled with water from a well of average depth 10 m. The work done will be

Calculate work done in raising a stone of mass 5 kg, specific gravity 3, lying at the bed of a lake through a height of 5 metre.

Two points in an electric field have a potential difference of 5V. What is the amount of work done in moving a charge of 3C from one point to the other? (Write the answer only)

Calculate work done in rotating a bar magnet of magnetic moment 5Am^@ when rotated through an angle of 180^@ from its rest position parallel to an external magnetic field of 0.4 T.