When an object is lifted 12 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 24 meters off the ground, its potential energy is which of the folowing?
D. twice as much
Answer:
D. twice as much.
Explanation:
The question varies the potential energy at two different heights.
The formular for potential energy is given as;
P.E = m × g × h
where;
m = mass
g = gravitational force
h = height
In both cases, m and g are both constants so we have;
First Case; P.E = mg * 12 (when h = 12)
Second Case; P.E =mg * 24 (when h = 24)
Comparing both cases, we can deduce that;
Second Case = 2 * First Case.
This means that the potential energy would be twice as much.
