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# (II) A $1.60\text{-m-tall}$ person lifts a $1.65\text{-kg}$ book off the ground so it is $2.20\ \text{m}$ above the ground. What is the potential energy of the book relative to (a) the ground,

Solution

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In this exercise, we need to calculate the gravitational potential energy of the book relative to the ground. For that, we have the following data:

• Height of the person: $h_p=1.6\text{ m}$;
• Mass of the book: $m=1.65\text{ kg}$;
• Final height of the book: $h=2.2\text{ m}$.

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