I'm interested in the case of cliff jumping. It is dangerous because if you are jumping from a height the water resistance will stop you like concrete. However, you mitigate this by jumping in a streamlined position, including pointed toes, locked knees, arms straight vertical, etc.
But I am curious that if you are going to be killed by hitting the bottom at a high speed, even if you survived the initial impact. For example, I hit the bottom of a 3.7-metre deep pool fast even I just walked into it at the edge of the pool. Let's assume the following dimension:
- The jump is done vertically in the most streamlined way possible.
- The jumping man has a neutral buoyancy on the surface of water.
- The jumping man keeps the streamlined position even after entering the water, until the deceleration due to water resistance stops.
If the man jumps from x m height, how I can calculate
- The terminal speed after entering water.
- How deep in water he will attain the terminal speed.