Answer:
784 J
Explanation:
The formula for potential energy is PE = mgh, where m is the object's mass, g is the gravitational constant (on earth, it is 9.8 m/s/s) and h is the height from the ground. Using the given information,
m = 2 kg
g = 9.8 m/s/s
h = 40 meters
Plug in the given information into the formula for potential energy.
PE = (2)(9.8)(40) = 784 J
