When a rigid sphere is projected horizontally with an initial linear velocity over a uniformly rough horizontal floor

A uniform sphere is projected horizontally with a purely translatory motion with initial velocity of 7m/s on a rough horizontal surface with coefficient of friction 0.2 . Given, g=10m/s^(2) ,the time after which the sphere stops slipping (in seconds) is

A sphere is projected horizontally with a speed v from the edge of a table of height h above a level horizontal floor. At the same instant, another sphere is released from the edge of the same table. Identify which of the following statements is true?

A ball is projected vertically down with an initial velocity from a height of 20 m onto a horizontal floor. During the impact it loses 50% of its energy and rebounds to the same height. The initial velocity of its projection is

A ball is projected vertically down with an initial velocity from a height of 20 m on to a horizontal floor. During the impact it loses 50% of the energy and rebounds to the same height, the initial velocity of its projection is

A ball is projected vertically down with an initial velocity from a height of 20 m onto a horizontal floor. During the impact it loses 50% of its energy and rebounds to the same height. The initial velocity of its projection is

A ball is projected vertically down with an initial velocity from a height of 20m on to a horizontal floor. During the impact it loses 50% of its energy and rebounds to the same height. The velocity of projection is (g=10ms^(-2))