practice_prelim1_ws_fa07

# practice_prelim1_ws_fa07 - 4?ecno leehw eht etator ot...

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Unformatted text preview: b). The hill the biker is climbing is 100m high and 1000m long (hypotenuse). If her mass is, m=50kg, and potential energy is P e = m g h , how much energy will she need to get up the hill? (let g=10m/s 2 ) c). If the bicycle has a wheel diameter of d=2 =π , how many rotations will the wheel require to climb the slope? How much energy is needed for each ro-tation? d). What should the gear ratio be to be sure she makes it up the hill? Hint: how many pedal rotations are required to give the bike enough energy to rotate the wheel once? 4...
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• Spring '07
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