Answer:
An object has potential energy (stored energy) when it is not in motion. Once a force has been applied or it begins to move the potential energy changes to kinetic energy (energy of motion).
EXAMPLE: A rock sitting on the edge of a cliff. If the rock falls, the potential energy will be converted to kinetic energy, as the rock will be moving. A stretched elastic string in a longbow.
Answer:
Option D is the correct answer.
Explanation:
Stress is the force per unit area that tend to change the shape of body.
Stress is defined as internal resistive force per unit area.
![\texttt{Stress}=\frac{\texttt{Internal resistive force}}{\texttt{Area}}](https://tex.z-dn.net/?f=%5Ctexttt%7BStress%7D%3D%5Cfrac%7B%5Ctexttt%7BInternal%20resistive%20force%7D%7D%7B%5Ctexttt%7BArea%7D%7D)
![\sigma =\frac{F}{A}](https://tex.z-dn.net/?f=%5Csigma%20%3D%5Cfrac%7BF%7D%7BA%7D)
So, so stress distributed over an area is best described as internal resistive force.
Option D is the correct answer.
The motivation behind why the vertical stature of the stairs is the main thing measured is that it uncovers to us how much gravity is up against the individual and their weight, so we require this data to decide how much vitality and power we have to get up the stairs.
the answer i think is asphalt and plastic