How much work was done on the pine cone by air resistance

Reference no: EM13320816

A 0.21-kg pinecone falls 15 m to the ground, where it lands with a speed of 9 m/s

(a) How much work was done on the pine cone by air resistance?

(b) What was the average force of air resistance exerted on the pine cone?

Reference no: EM13320816

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