(a) A 120-lb woman rides a 15-lb bicycle up a 3-percent slope at a constant speed of 5 ft/s. How much power must be developed
(a) A 120-lb woman rides a 15-lb bicycle up a 3-percent slope at a constant speed of 5 ft/s. How much power must be developed by the woman?
(b) A 180-lb man on an 18-lb bicycle starts down the same slope and maintains a constant speed of 20 ft/s by braking. How much power is dissipated by the brakes?
Ignore air resistance and rolling resistance.
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5 ft/s 20 ft/s 3% slope
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tan 3100 1718 o a W W B W W 15 120 W 135 lb P W Wv Wsin... View full answer
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Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self
11th edition
73398241, 978-0073398242
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