super engines
Momentum.
Those are cars, also known as monster machines or monsters. They are loud, fast-moving vehicles that pose a danger to the cats in the ThunderClan territory.
A lion is slow and fast because, when it is just walking it is slow but when it is hunting it is super fast.
Every single vehicle ever made was and is made by man.
Moving water can easily sweep pedestrians and vehicles downstream. The water does not need to be moving fast, but obviously, flash flooding imposes the greatest risk. Vehicles can be engulfed or overturned. People can be carried downstream for miles and drown from fighting the water.
fast moving
A "radar gun" is used by police to know the speed of fast moving vehicles. Velocity is a vector. That means it has magnitude and direction. Its magnitude is same as speed.
Fast moving water.
fast
There is a brand called Fast Trucks. These can be bought online at sites like eBay and Amazon. If you are looking for trucks, as in fast automobiles, you should be able to compare online and shop at your local dealership.
moving fast in Japanese is "subayai"
A dolphin is a fast moving animal if you think about it.