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22 February, 05:07

You lower a 2.50 kg textbook (remember when textbooks used to be made out of paper instead of being digital?) from a height of 1.85 m to 1.50 m. What is its change in potential energy?

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  1. 22 February, 05:36
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    Change in potential energy = 8.58 J

    Explanation:

    Potential energy = Mass x Acceleration due to gravity x Height

    Potential energy = mgh

    m = 2.50 kg

    g = 9.81 m/s²

    Initial height, h₁ = 1.85 m

    Final height, h₂ = 1.50 m

    Change in potential energy = mgh₁ - mgh₂

    Change in potential energy = 2.5 x 9.81 x 1.85 - 2.5 x 9.81 x 1.50

    Change in potential energy = 8.58 J
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