[idontpost]

Conservation of momentum says otherwise -- the faster the ball is going, the more change in momentum it needs, the harder it needs to be hit.

[psd1]

If you want a ball to bounce further off something, throw it harder.

[hota_mazi]

Yes for elastic shocks, but bat to ball is not an elastic hit (well, barely one, to the point where the physics you refer to don't matter).

[lupire]

Or the farther the bast needs to bounce off th ball.