Identical packets are dropped from two aeroplanes, one above the equator and the other above the north pole, both at height h. Assuming all condition are identical, will those packets take same time to reach the surface of earth. Justify your answer.

Two spherical bobs, one metallic and the other of glass, of the same size are allowed to fall freely from the same height above the ground. Which of the two would reach earlier and why?

A ballon is ascending at the rate of 14 ms^-1 at a height of 98 m above ground when a packet is dropped from the balloon. After how much time and with what velocity does it reach the ground.

Two identical wires one of Nichrome and other copper are connected in series and a current I is passed through them.State the change observed in the temperature of the 2 wires .Justify your answer .State the law which explains the above observation.

The method of eliminating 'theta' from two given equations involving trigonometrical functions of 'theta' . By using given equations involving 'theta' and trigonometrical identities, we shall obtain an equation not involving 'theta' . On the basis of above information answer the following questions. If x sin^(3) theta+ y cos^(3)theta= sin theta cos theta and x sin theta- y cos theta = 0 then (x, y) lie one