You (mass 55 kg) are riding a frictionless skateboard (mass 5.0 kg) in a straight line at

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You (mass 55 kg) are riding a frictionless skateboard (mass 5.0 kg) in a straight line at a speed of 4.5 m/s. A friend standing on a balcony above you drops a 2.5 kg sack of flour straight down into your arms.

(a) What is your new speed while you hold the sack?

(b) Since the sack was dropped vertically, how can it affect your horizontal motion? Explain.

(c) Now you try to rid yourself of the extra weight by throwing the sack straight up. What will be your speed while the sack is in the air? Explain.

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University Physics with Modern Physics

ISBN: 978-0133977981

14th edition

Authors: Hugh D. Young, Roger A. Freedman

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Question Posted: Oct 11, 2018 11:50 AM

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You (mass 55 kg) are riding a frictionless skateboard (mass 5.0 kg) in a straight line at

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IDENTIFY In the absence of a horizontal force we know that momentum is conserved SET UP p mv Let x b...View the full answer

University Physics with Modern Physics

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