Answerid sound
b. Kinetic
c. potential
sound
3) How does an object gain potential energy?
as by melting
b. by gaining speed
c. by cooling to a lower temperature
do by being raised above the ground
Answers

Potential Energy arises from two principal sources, namely gravitational attraction and coulombic attraction/repulsion.

In both cases, objects attract or repel one another through empty space, even through vacuum.

Let us take the Gravitation case as an example.

All masses attract one another in accordance with Newton’s Law of Gravitation.

A Brick lying on the road and planet Earth attract one another. Lift the brick, that is, pull the brick away from the the earth. You have to exert effort and perform physical work to do so. The brick acquires more potential energy. You let go of the brick and it falls to the earth spontaneously and on its own. This ability of the brick to move spontaneously and return the work performed on it is because of Potential Energy.

Exactly the same phenomenon occurs when we pull unlike electrical charges apart, or push like electric charges closer.

Other manifestations of potential energy, like stretching a rubber band are subsets of Coulombs Law