7. How much potential energy does a 2 kg book have on a 1.5 meter up shelf?

The potential energy (PE) of an object is calculated using the formula:PE = mghWhere:* m = mass (in kg)* g = acceleration due to gravity (approximately 9.8 m/s² on Earth)* h = height (in meters)In this case:* m = 2 kg* g = 9.8 m/s²* h = 1.5 mSo, the potential energy of the book is:PE = (2 kg) * (9.8 m/s²) * (1.5 m) = 29.4 JoulesTherefore, the book has 29.4 Joules of potential energy.