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Question

(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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