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John
John asked in Science & MathematicsPhysics · 9 years ago

Need physics help please?

In a certain library the first shelf is 10.0 cm off the ground, and the remaining four shelves are each spaced 30.0 cm above the previous one. If the average book has a mass of 1.40 kg with a height of 21.0 cm, and an average shelf holds 27 books (standing vertically), how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?

______J

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  • hello
    Lv 6
    9 years ago
    Favorite Answer

    WD = sum of (mgh) = 1.40 x 27 x 9.81 (.205 + .505 + .805 + 1.105 + 1.405)

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