1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Projectile-STUMPED Once again.

  1. Jun 13, 2007 #1
    1. The problem statement, all variables and given/known data

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 75.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and direction.

    2. Relevant equations

    Kinematics equations :)

    3. The attempt at a solution

    I already got 4.9 m/s as the magnitude of the vector, but can't seem to get the direction in degrees!
     
  2. jcsd
  3. Jun 13, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What's the horizontal component of her velocity?
     
  4. Jun 13, 2007 #3
    i just used the (9.1)squared=v initial squared +2(-9.8)(-3) and got the v initial magnitude...i dont know how to get the components is why i'm confused actually
     
  5. Jun 13, 2007 #4

    Doc Al

    User Avatar

    Staff: Mentor

    Hint: You have her final speed and angle. Use it!
     
  6. Jun 13, 2007 #5
    ok, so i got 3.85 as vx and for vy =8.79 but how does that help me?
     
  7. Jun 13, 2007 #6

    Doc Al

    User Avatar

    Staff: Mentor

    Show how you got that value.

    Does the horizontal component of velocity change as the diver falls?
     
  8. Jun 13, 2007 #7
    Haha I got the answer...thanks for your help =)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Projectile-STUMPED Once again.
  1. I'm Stumped (Replies: 9)

  2. Completely stumped. (Replies: 3)

Loading...