Unbalanced because if it is pushing then stopping, that means that it is unbalanced.
The answer for this question is b because it says how far it goes before he begins to take brake
1,000 watts = 1 kilowatt
2,000 watts = 2 kilowatts
3,000 watts = 3 kilowatts
4,000 watts = 4 kilowatts
<em>5,000 watts = 5 kilowatts</em>
I think they are right! When one of the answers is, all of the above, that is usually the correct answer. pH is important to all living things.