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) (2)In the above situation the block wili have maximum velocity when:

A ball is projected vertically upwards. Air resistance and variation i

1.	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) (2)In the above situation the block wili have maximum velocity when:
Answer» the SPRING force BECOMES ZERO the FRICTIONAL force becomes zero the net force becomes zero the acceleration of block becomes zero Answer :C::D