In the figure masses `400 kg` and `100 kg` are fixed.

(a) How much work must be done to move a `1 kg` mass from point `A` to point `B`?
(b) What is the minimum kinetic with which the `1 kg` mass must be projected from `A` to the right to reach the point `B`?

In the figure masses 400 kg and 100 kg are fixed. (a) How much work must be done to move a 1 kg mass from point A to point B ? (b) What is the minimum kinetic energy with which the 1 kg mass must be projected from A to the right to reach the point B ?

100 joule of work must be done to move a charge of -200 C from the point A to point B. What is the potential difference.?

A point mass of 10 kg is placed at the centre of earth. The weight of the point mass is

A point mass of 10 kg is placed at the centre of earth. The weight of the point mass is

A skater of mass 50 kg moves down from A to B. The frictional forces are absent. What is the kinetic energy at B?

A 4 kg mass and 1 kg mass are moving with equal linear momenta.The ratio of their kinetic energies is

Two masses A and B of mass 15kg and 6kg are connected by a string passing over a friction pulley fixed at the corner of a table as shown in The coefficient of friction between A and table is 0.3 the minimum mass (in kg) of that must be placed on A to prevent it from moving is .

Two masses, 800 kg and 600 kg are at a distance 0.25 m apart. The magnitude of total force experienced by a body of mass 1 kg placed at a point distance 0.2 m from the 800 kg mass 0.15 m from the 600 kg mass :