# Search results

1. ### Need work checked(dyanmics projectile problem)

Thank you Phantom, I wasnt taking care of my 't' because I had it written incorrectly on a different set of notes. If I had took the time to think about it, I probably would have corrected it.
2. ### Need work checked(dyanmics projectile problem)

Ok, this is what I am doing: 4.9t^2= -1.048+(4.772/cos30)sin30 t's cancel on right side? taking square toot to both sides and solving for t: 2.21t= 1.306 t=.59s I am moving t^2 to the left side, I dont know why I am now getting different valudes for t.
3. ### Need work checked(dyanmics projectile problem)

Geeze I cant believe I mist that. Okay so: Yo = 2m Yf = 3.048m 3.048m = 2m + (4.772m/cos(30)t)*sin(30)t - 1/2(9.81)t^2 t = 1.7s Vo = 4.772/cos(30)*(1.7s) V0 = 9.37m/s
4. ### Need work checked(dyanmics projectile problem)

I am not sure about my value for 't'. I take the square root of both sides and solve for t, I get .987 when 4.9 over 4.775 or 1.013 when 4.775 over 4.9.
5. ### Need work checked(dyanmics projectile problem)

I am solving for 't', so y = 0. But I use 2m for my Y0. Here is a little more detail in my steps: x = Vo cos(30)*t 4.772m = Vo*cos(30)*t Vo = 4.772/cos(30)t y = Yo + Vo*sin(30)t - 1/2gt^2 0 = 2m + (4.772m/cos(30))*sin(30)t - 1/2(9.81)t^2 (4.9)t^2 = (4.775)t^1/2 t = .987s Vo =...
6. ### Need work checked(dyanmics projectile problem)

So its been several days now and no response. Perhaps I would have had better luck under the Physics section? If I did not explain the problem clearly I posted a link to the problem which includes a picture. I am pretty confident my work is correct but would feel a lot better if someone else can...
7. ### Need work checked(dyanmics projectile problem)

First time poster, site looks very informative so I thought I would make a post. This is for Mechanics class and now covering Dynamics. This is my take home problem. A basket ball player shoots when she is 5 m from the backboard. Knowing that the ball has an intial velocity Vo at an angle of...