A 014-kg pinecone falls 16m on the ground where it lands, Ask an Expert

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A 0.14-kg pinecone falls 16m on the ground, where it lands with aspeed of 13 m/s.

A) What speed would the pinecone have landed if there had been noair resistance?

B) How much work was done on the pinecone by air resistance?

C) What was the avg. air resistance exerted on the pinecone?

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