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anonymous

  • 4 years ago

A 1.5kg dynamics cart is fastened by a horizontal cord over a pulley at the edge of a table to a mass of 0.50 kg. The frictional resistance in the wheels and pulley is 1.2N. Calculate the acceleration of the cart.

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  1. anonymous
    • 4 years ago
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    can you draw a free body diagram as well. It might help me understand the question especially where the mass is.

  2. TuringTest
    • 4 years ago
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    You know, I never looked a pulleys very much. I should do so. Right now I can't solve your problem though, sorry.

  3. anonymous
    • 4 years ago
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    lol yeah this thing confuses me. i dont know where the pulley is located

  4. TuringTest
    • 4 years ago
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    |dw:1327893896324:dw|this is the jist of the situation I think

  5. TuringTest
    • 4 years ago
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    so the force acting on the cart would be\[F_g-f=m_ca\]where m_c is the mass of the cart. Acceleration follows from that quickly, but I'm basically figuring this out from looking at it, so it may be wrong.

  6. TuringTest
    • 4 years ago
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    \[F_g-f=m_ca\to a=\frac{mg-f}{m_c}=\frac{(0.5)(9.8)-1.2}{1.5}\approx2.5m/s^2\]according to my calculations

  7. TuringTest
    • 4 years ago
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    here's something that's almost a free-body, but a free body diagram only makes partial sense to me here...|dw:1327894489825:dw|

  8. TuringTest
    • 4 years ago
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    forgot one, sorry:|dw:1327894650458:dw|