The Purplemath Forums

Hello, I really appreciate your site and all of the help that you do here. I am pretty sure that this section was the best choice for my problem. I use an application called Algodoo to make and use mathematical formulas. I use Algodoo to do this because I'm able to see the formula at work and becaus...

:lol: This isn't for homework, this is just for fun! I also realized that what I stated in the original post was not what I had originally meant. I will update the original post as soon as possible. Here's what I'm trying to find out: given the angle at which the object is shot and given the point a...

Sorry for the double post but I found out what the name of the formula is. It is the ballistics formula.

This deals with my ballistics formula. I found out how to solve for the speed! As far as I know, this formula does work properly. This formula only works if the surface the object is launched from and is flying over is flat. v^2=\frac{dg}{sin(2\theta)} v = Speed of projectile d = Distance tr...

Come on! I need help with this! If this is of any help have a look at this: http://en.wikipedia.org/wiki/Trajectory_of_a_projectile

Success! With the help of my friend who is amazing in calculus and trigonometry, I have done it!(except for air friction) D=\frac{v^2\sin(2\theta)}{g} Solve for v . In this case, we will use 100 as D and \theta will be 30° 100=\frac{v^2\sin(2\theta)}{g} (9.81)100=\frac{v^2 \t...

Domain and range is a bit confusing for me. I'm currently taking pre-calc. This is my first week of it and I have gotten most of it up until the test. I can't seem to get past the first question. :( Could you please help me out a bit? Imagine a mapping from the set of all integers onto the set of al...