The average speed is the ratio between the total space and the total time of the motion:

The total space is

while the total time is

So, the average velocity is

We can also rewrite it in m/s. The total space is

, while the time is

, and so
Its total mechanical energy is <em>2,000 J</em>.
We don't have enough information to say anything about its heat energy, its chemical energy, or the energy due to any electrical charge it may be carrying or any magnetic field it may have.
B. They are rearranged.
The First Law of Thermodynamics states that matter and energy can not be created or destroyed.