2) A roller-coaster moves 200 ft horizontally, then rises 135 ft at an angle of 30.0 degrees above the horizontal. It then travels 135 feet at an angle of 40.0 degrees below the horizontal. Use graphical techniques to find its displacement from the starting point at the end of this movement.(adsbygoogle = window.adsbygoogle || []).push({});

I feel like such an idiot! I dont even know how to draw this thing out! My attempt is attached.

How would you solve this graphically? In my class today my teacher told us that we wouldnt have to use the Law of Cosines or Law of Sines and just be able to use simple trig to figure it out. However, there are no 90 degree angles to work with. I've been working on this thing for almost 40 minutes and this is the best i can do damn..

2) Vector A is 3.00 units in length and points along the positive x-axis. Vector B is 4.00 units in length and points along the negative Y-axis. Use graphical methods to find the magnitude and direction of the vectors. A) A + B and (b) A - B

I have attached my attempt.

3) A jogger runs 100 m due west, then changes direction for the second leg of the run. At the end of the run, she is 175 m away from the starting point at an angle of 15.0 Degrees north of west. What were the direction and length of her second displacement? Use graphical techniques.

My drawing attempt is attached.

For this problem.. i dont really see another way of coming up with the answer unless i use the law of sins. My teacher specifically told us not to though.. he said these questions could be done with simple trig. I have no idea what he's talking about though, i think im just an idiot

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# Homework Help: Need some serious help with VECTORS!

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