Potential energy is the energy possessed by a body by virtue of its position or configuration . And energy is the capacity of doing work since power is work divided by time therefore change in potential energy divided by time is equal to the power of the object.
Yes you should if you will like to. It is your opinion so follow your dreams if they are your dreams.
The answer might be B because the value is negative, and negative could mean slowing down.
Of the materials listed wood is the best insulator. It would be the least hot if exposed to similar temperatures.
