Iqbal has to push a lighter box and Seema gas to push a similar heavier box on the same floor . Who will have to apply a larger force and why ?

Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?

A lighter body and a heavier body have same K.E. Which one has greater momentum?

A person is trying to push a box, the whole day he makes use of his stored energy but cannot move it. In physics we say he has not done any work. Explain why?

A box is placed on an inlcined plane and has to be pushed down. The angle of inlcination is

While pushing a heavy box from one place to another in his house, Naresh noticed that it was difficult to take a stationary box from its resting position to moving position but it was easy to move that box with that speed. Why was it so?

A company sells biscuits. For packing purpose they are using cuboidal boxes : box A to 3cm xx 8cm xx 20cm , box B to 4cm xx 12cm xx 10 cm . What size of the box will be economical for the company? Why? Can you suggest any other size dimensions which has the same volume but is more economical than these?