David lifts a book 1.2 meters from the floor to the top of his desk. if the book weighed 0.50 kg, what is the gravitational potential energy gained by the book? estimate g as 9.81.

5.886 J

Explanation:

Given:

The mass of the book is, kg

Height of lift is, m

Acceleration due to gravity is, m/s²

Now, gain in gravitational potential energy is a function of change in position and is given as:

Here, is the change in gravitational potential energy.

Plug in 0.5 kg for , 9.81 for and 1.2 for . Solve for

Therefore, the gain in gravitational energy of the book is 5.886 J.

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heat the gas and measure the pressure