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abannavong

  • 3 years ago

Physics help with torque! The crank arm of a bicycle is 16.5 cm long. If a 52.0 kg woman puts all weight on one pedal, how much torque is developed a. when the crank is horizontal b. when the crank is vertical

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  1. sarahi_smiles
    • 3 years ago
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    I just know A ok

  2. abannavong
    • 3 years ago
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    can u help me with a.

  3. sarahi_smiles
    • 3 years ago
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    But anyway A is...84.2Nm

  4. abannavong
    • 3 years ago
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    how do you find tht

  5. sarahi_smiles
    • 3 years ago
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    give me one second... F=mg t(torch)=rF sin emtyset sign emptyset sign =90 degrees t(torch)= (0.165)(52.0)(9.81)(SIN165) t(torch)= 84.2Nm

  6. sarahi_smiles
    • 3 years ago
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    there you go...sorry I couldn't help you with b...

  7. abannavong
    • 3 years ago
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    its alright

  8. abannavong
    • 3 years ago
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    i have another question though .. if a force of 4 N is needed to open a 1m wide door when applied at the edge opposite the hinges what force must be applied to open the door if you push against the door 10 cm from the hinged side

  9. sarahi_smiles
    • 3 years ago
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    I'm not sure...sorry...

  10. abannavong
    • 3 years ago
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    oh ok thanks

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