A ball is projected vertically upwards. Air resistance and variation in g may be neglected. The ball rises to its maximum height H in a time T, the height being h after a time t : (1) The graph of kinetic energy `E_(k)` of the ball against height h is shown in figure 1 (2) The graph of height h against time t is shown in figure 2 (3) The graph of gravitational energy `E_(k)` of the ball against height h is shown in figure 3 (1) Two particles move on a circular path ( one just inside and the other just outside) with angular velocities ro and `5 omega` starting from the same point. Then :A. they cross each other at regular intervals of time `(2 pi)/(4 omega)` when their angular velocities are oppositely directedB. they cross each other at points on the path subtending an angle of `60^(@)` at the centre if their angular velocities are oppositely directedC. they cross at intervals of time `(pi)/(3 omega)` if their angular velocities are oppositely directedD. they cross each other .at points on the path subtending `90^(@)` at the centre if their angular velocities are in the same sense