A 021-kg pinecone falls 10 m to the ground where it lands
A 0.21-kg pinecone falls 10 m to the ground, where it lands with a speed of 12 m/s.
(a) How much work was done on the pine cone by air resistance?
J
(b) What was the average force of air resistance exerted on the pine cone?
N (upward)
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A sound wave generated by a source of frequency 440 Hz is moving through 25 oC air. What is the wavelength of the sound wave inside the steel
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A 0.21-kg pinecone falls 10 m to the ground, where it lands with a speed of 12 m/s. How much work was done on the pine cone by air resistance
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