To calculate the potential energy (PE) of the water tank, you can use the formula for gravitational potential energy:
where:
is the mass of the object (in kilograms), is the acceleration due to gravity (approximately ), is the height above ground (in meters).
Given:
Now plug in the values:
Calculating it step-by-step:
-
Calculate
: -
Now multiply by the mass
:
So the potential energy of the water tank is approximately
The correct answer is:
21,599,200 J