Answer:
800 J
Step-by-step explanation:
To do work, this truck uses energy stored in chemical fuel and an electrical battery.
How much total energy does this truck put out?
50 J
250 J
400 J
800 J
Because all you have to do to find initial energy is add up all the energy that was was used up in different forms.
Kinetic Energy 400 J
Heat Energy 250 J
Friction Energy 150 J
Total Initial Energy 800 J