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Posted by on Sunday, December 11, 2011 at 10:28pm.

a. How much power is generated by a motor that lifts a 300.0 kg crate vertically 8.0 meters in 6.0 seconds?

b. If the crate is dropped on a large vertical spring that has a spring constant of 200,000 N/m, how far does it compress the spring?

  • physics - , Monday, December 12, 2011 at 1:54pm

    a.) P = (mgd)/t so just plug in and solve

    b.) mgy(spring) + 1/2ky(spring) = mgy(crate)
    y(spring) = mgy(crate) / (mg+1/2k) and now you can plug in again and solve

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