In a gravity free space, man of mass `M` standing at a height `h` above the floor, throws a ball of mass `m` straight down with a speed `u`. When the ball reaches the floor, the distance of the man above the floor will be.

A man of 50 kg mass is standing in a gravity free space at a height of 10m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2m//s . When the stone reaches the floor, the distance of the man above the floor will be

A young man of mass 60 kg stands on the floor of a lift which is acceleration downwards at 1m//s^(2) then the reaction of the floor of the lift on the man is (Take g = 9.8 m//s^(2) )

A ball is dropped from a height h on a floor. The coefficient of restitution for the collision between the ball and the floor is e. The total distance covered by the ball before it comes to the rest.

A uniform disc of mass 'm' and radius R is placed on a smooth horizontal floor such that the plane surface of the disc in contact with the floor . A man of mass m//2 stands on the disc at its periphery . The man starts walking along the periphery of the disc. The size of the man is negligible as compared to the size of the disc. Then the center of disc.

A wooden plank of mass 20kg is resting on a smooth horizontal floor. A man of mass 60kg starts moving from one end of the plank to the other end. The length of the plank is 10m . Find the displacement of the plank over the floor when the man reaches the other end of the plank.

A man of mass m is standing on a plank of equal mass m resting on a smooth horizontal surface. The man starts moving on the plank with speed u relative to the plank. The speed of the man relative to the ground is

A boy of mass m is standing on a platform of M kept on smooth floor. If the body starts moving on the platform with a speed v_(0) relative to the platform , with what velocity to the floor does the platform recoil ?

A ball of mass m is released from A inside a smooth wedge of mass m as shown in figure. What is the speed of the wedge when the ball reaches point B?