Whip is the rapid movement of the barrel around the hands and is caused by the transfer of energy from the body to the barrel of the bat.

Albert Pujols

Whip is created by...

From the standpoint of physics, Whip is an example of the principle of conservation of momentum; of transferring energy from the body to the bat.

I have put together a number of pieces that go into the details about Whip.

. The Role of the Hands
... Whip and the Grip
. Hinge, Hold, and Release
... Hinge Angle
. Acceleration, Deceleration, and Whip
... The Triple Pendulum and Ben Hogan's True Secret? 
...... Whip and the Back Elbow
. Judging Whip
... Whip Position 
... The Myth of the Brace Position 
. Reducing the Radius
. Stalling the Barrel
. Frequently-Asked Questions about Whip