On the other hand, if the wall is too thick, it won't reach a high enough velocity. (sciencemag.org)
The visual effects team designed a steam - piston mechanism that was inserted into the trailer so it could reach a high enough velocity to flip forward. (screenrant.com)
For dynamic effort, the athlete must be careful not to use too much weight (or too little)- weights that are too light (20 - 30 % of max) do not provide enough mechanical load to require ALL motor units be recruited, and weights that are too heavy (60 + %) can not be moved with enough velocity to train rapid contraction. (completehumanperformance.com)