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science

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a crane does 62,500. J of work lifting a 120.-N backpack?
a. How high did you lift the backpack?
b. How much did the backpack weigh in pounds? (Hint: There are 4.448 N in one pound.)

  • science -

    a. 62,500 J = M g H

    M g = 120 N.
    Solve for H

    b. 120 N/4.448 N/lb = ____lb

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