(a) A sky diver jumps out of a plane. After he reaches terminal velocity, he opens his parachute. Of the two forces- the air resistance and gravity acting on the sky diver after the parachute opens, which is greater.
(b) Air being a fluid produces a small buoyant force on the skydiver. How does the buoyant force change after he opens his parachute? Why?

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Solution

(a) The air resistance would be greater than that for gravity.
(b) The buoyant force will increase because the diver is increasing volume but not weight.

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(a) The air resistance would be greater than that for gravity.(b) The buoyant force will increase because the diver is increasing volume but not weight.

(a) The air resistance would be greater than that for gravity.
(b) The buoyant force will increase because the diver is increasing volume but not weight.