Question

Science Behind Swimming
Why should we shake our hands to keep floating in sea? Does it matters to increase the buoyancy force, which helps in floating?

Answer 1

according to Newtown's third law of motion action &reaction are equal & opposite .
so when we shake our hand in backward direction , it is our action then force of water pulled us in forward direction that is reaction.
so , shaking our hands is not matters from buoyancy only