A man X goes to the top of a building by a vertical spiral staircase. Another man Y of the same mass goes to the top of the same building by a slanting ladder. Which of the two does more work against gravity and why ?

Angad and Nalin were observing a building having two different staircases. One slanting and other vertically spiral. Angad was of the opinion that a person using slanting staircase will be doing more work against gravity but Nalin though otherwise. They started quarrelling. Arif, their friend, explained and gave entirely different view and pacified them. What according to you was the explanation given by Arif?

A man having a box on his head, climbs up a slope and another man having an identical box walks the same distance on a levelled road. Who does more work against the force of gravity and why?

From the ground floor a man comes up to the fourth floor of a building using a staircase. If the man comes up to the same floor using an elevator, neglecting friction, compare the work done by the man in the two cases.

A ball is dropped from the top of a building of height 80 m. At same instant another ball is thrown upwards with speed 50 m/s from the bottom of the building. The time at which balls will meet is

A ball is dropped from the top of a building of height 80 m. At same instant another ball is thrown upwards with speed 50 m/s from the bottom of the building. The time at which balls will meet is

Two balls A and B of same masses are thrown from the top of the building A . Thrown upward with velocity V and B , thrown downward with velocity V , then

Two balls A and B of same masses are thrown from the top of the building A . Thrown upward with velocity V and B , thrown downward with velocity V , then