No the substance will remain the same substance as before.
Yes because if they are further away it makes it hard for them to attract each other
The ball's vertical velocity at the time it just passes over the goal is 0 m/s. Its initial vertical velocity is unknown and we denote it by 
, where 
here is the ball's initial speed. Vertically, the only force acting on the ball is gravity, which attributes a downward acceleration of 9.8 m/s^2. We expect the maximum height achieved by the ball to be 2.4 m, so we can find the initial speed by solving
The amount of solid does not affect how you are describing the solid so a is the answer
