the correct way to train for strength is to maximize power during the eccentric, commonly known as 'exploding out of the hole'
your body could care less about momentum and tempo, all it knows is work, and power
since the work done in moving a weight from point A to point B is the same regardless of tempo, the logical thing to do is to increase the speed of the lift, which improves power output
keep doing your fancy tempo with middle school weights lets see how strong you get