The ratio of the range for upward and down ward projections is:

The ratio of component of velocity striking perpendicular to the plane for upward and downward projection is:

The ratio of speeds of striking for upward and downward projection is:

If the particle is projected down onto the inclined plane at same speed and angle with the inclined plane the ratio of the time of flight and time of flight for upward projection is :

Two stones of masses m and 2 m are projected vertically upwards so as to reach the same height. The ratio of the kinetic energies of their projection is

A block of mass 'm' is placed on the rough floor of lift. Lift may have any magnitude of acceleration either in upward direction (or) down ward direction. The minimum friction will be

A block of mass 'm' is placed on the rough floor of lift. Lift may have any magnitude of acceleration either in upward direction (or) down ward direction. The minimum friction will be

The range of a projectile is R when the angle of projection is 30^@ . For the same velocity of projection and range the other possible angle of projection is:

A body has maximum range R_1 when projected up the plane. The same body when projected down the inclined plane, it has maximum range R_2 . Find the maximum horizontal range. Assume equal speed of projection in each case and the body is projected onto the inclined plane in the line of the greatest slope.

A body has maximum range R_1 when projected up the plane. The same body when projected down the inclined plane, it has maximum range R_2 . Find the maximum horizontal range. Assume equal speed of projection in each case and the body is projected onto the inclined plane in the line of the greatest slope.