
Concept explainers
To Explain: The reason the stones hurt the feet less when a person steps in deep water.

Explanation of Solution
Introduction:
Buoyant force: The force which is exerted by a fluid on the body is a buoyant force. It is the difference between the weight of an object in space and the weight of an object immersed in a fluid.
When a person goes inside water, a force starts acting on the body which is known as buoyant force. The buoyant force opposes the gravitational force. Due to buoyant force,the effect of gravitational force on the body starts decreasing and hence the body starts feeling lighter. Since the weight of the body exerted on stones becomes less, so the force on feet will also become less and cause less pain on the feet.
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