You need to do your best in everything that you do in life because that would determine if you are going to be successful or not. Winners would take the world and the loser are left to stare at the winner. It is up to you on which path you want to follow. Losers tend to do their best at the beginning, but tend to give up when the going gets tough. If you want to reach something in life then you need to fight and reach your goal. Even if you lose a race, it doesn't mean that you are a loser in all your life. You need to stand up and prove to the world that you are no loser.
Drive you truck as fast as you can to win the race. However, you need to understand that your truck is not indestructible, so bumping into an obstacles isn't recommended. it would be wise to avoid them at all cost, but if you can't do that, then at least try to minimize the bumps that you get. If you can't do that and keep on bumping into an obstacle or the other truck then your truck would surely break and you are out all you can do is to watch your competitor to win the race.