A 2 kg book sits on a shelf 2 meters high. How much potential energy does the book have? gravity=9.8 m/sec^2
8 J
16.8 J
39.2 J
98.4 J
The potential energy of an object is given by the formula PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height.
In this case, m = 2 kg, g = 9.8 m/s^2, and h = 2 m. Substituting these values into the formula, we get:
PE = (2 kg)(9.8 m/s^2)(2 m)
PE = 39.2 J
Therefore, the book has 39.2 J of potential energy.