My professor gave us no solutions and my final is in two days PLEASE HELP

[ghettobacon]

I cannot for the love of god figure out to do this projectile motion problem, the first problem on this practice exam. Our professor for whatever reason decided not to give a solution page. Somebody PLEASE explain the first problem to me...and if youre feeling brave itd be nice if you could do a few of the others.

I uploaded the pdf to sharebeast, the link is here http://www.sharebeast.com/ozpiopxlfzg6

edit: didnt realize you can just add attachments on here, so i did

 

[Pengwuino]

Well, since this isn't "Do Your Homework For You.com", you'll need to actually show some work first. That is a simple projectile motion problem, you must have some idea on how to do it.

 

[ghettobacon]

sorry I didnt imply it to be that, i just assumed I did this problem completely wrong.. well this is how I did it

method1:

i used rho= (v_final)^2/a_normal where rho is the radius of curvature and v_final would be at the top of the arc. plugging in, rho=7.5 m, a_normal=10 g/s^2 giving you v_final=sqrt(75)

applying v_final= v_o + at, in th x direction gives sqrt(75) = v_o*cos(30) which would mean v_o = 10 m/s

is this correct?

 

[vela]

Yes, that's correct.

 

[rwisz]

I understand the frustration of not having solutions provided for practice problems. However, it is important to remember that the purpose of practice problems is to help you develop problem-solving skills and critical thinking abilities. Instead of relying on solutions, I suggest reviewing the concepts and equations related to projectile motion and working through the problem step by step. You can also try looking for online resources or asking a classmate or tutor for assistance. Additionally, it may be helpful to reach out to your professor for clarification on any specific concepts or equations that you are struggling with. Remember to stay calm and focused, and trust in your ability to tackle this problem. Best of luck on your final exam.