I seem to have problems with these sort of questions, can someone shed some light on this for me?
You are holding a reel with a line, attached to a balloon, spooling from it. The balloon was released from a spot on level ground 20ft from you and is rising straight up. How fast is the balloon rising when the reel indicateds that 25 feet of line is out and that more is spooling from it at 3 feet per second? Also, how high is the balloon at that same point?
What do I need to do to set up the equation here?