Concept:Work done against gravity to move an object to a given position is stored as gravitational potential energy.
Explanation:When an object is lifted to a point in a gravitational field, work is done against its weight.
The force needed is
F=mg, where
m is the mass and
g is the gravitational field strength.
If the object is raised through a height
h, the work done is
W=mgh.
This work is stored as gravitational potential energy, so
PE=mgh.
Thus, energy gained by an object due to its position in a gravitational field is called gravitational potential energy.
Answer:A. Gravitational potential energy