Two stones of different sizes are dropped simultaneously from the top of a bulding.Which stone would reach the ground earlier?

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?

Two stones of masses in the ratio of 3:4 fall from heights in ratio 4:9. The ratio of their momenta on reaching the groundis

A body is dropped form the top of the tower and reaches the ground in 3s. Then the height of the tower is

Two boatmen start simultaneously from the opposite shore of a river with same speed and they cross eachother after 45 minutes of their starting from the respective shores. They rowed till theyreached the opposite shore and returned immediately after, reaching the shores. When willthey cross each other again?