Help me please! :-)

Hey all! It's that time of the semester again...that's right! Physics time! :-) I'm burning myself out trying to figure out how to do these problems without any success, any takers?
I'm open to any suggestion and information that anyone might be able to provide...:-)
Thanks in advance for your time...
Jared




P.S. I have two more tests after this one, and then I'll be done with physics and i won't have to bother you all again...:-)
I'm open to any suggestion and information that anyone might be able to provide...:-)
Thanks in advance for your time...

Jared




P.S. I have two more tests after this one, and then I'll be done with physics and i won't have to bother you all again...:-)