There is tons of resources out there to learn physics. These don't seem like hard problems either. Just think, when it comes time to take a quiz/exam you are not gonna have a forum giving you the answers. It is best to learn it and understand it on your own. I see so many people do lousy on quizzes and exams and that is because they rely on the book or friends to give them answers but do not have a knowledge/understanding of it at all. And if you are struggling with the easier stuff, it only gets harder. You need to understand the lower stuff or you won't make it with the more challenging problems.