Recent content by jbutl3r25

  1. J

    Projectile questionplease help

    yeah we weren't taught that.. but im thinking that what i may have done is but the 5.5 in the wrong spot? or should the original velocity be zero?
  2. J

    Projectile questionplease help

    A cannon ball is fired from a catapult at 13.5 m/s at 24 degrees above the horizontal. a. How long is it in the air? b. What is the horizontal component of the velocity? c. How far from the catapult does the ball land? I used a program on my calculator that we are allowed to use and...
  3. J

    Big Bertha Projectile Question

    ohh ok now i got that... so vx = .811 and vy = .585 so should i go and do the vf, vo, a, d, t set up? like vx .811 dx? t vfY voY 0 aY -9.8 dY t and if so, how would i find a 3rd component to the Y part?
  4. J

    Big Bertha Projectile Question

    cos(35.8) gives me -.32 and sin(35.8) gives me -.95 i dont think that works
  5. J

    Big Bertha Projectile Question

    i don't think that makes sense...
  6. J

    Big Bertha Projectile Question

    During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.11 km/s at an initial inclination of 35.8 degrees to the horizontal. a.How far away did the shell hit? Answer in km. b. How long was it in the air? I have a...
  7. J

    Need a little help

    Ok this is a follow-up type of question. The first problem was : A pelican flying along a horizontal path drops a fish from a height of 3.7 m. The fish travels 8.2 m horizontally before it hits the water below. What is the pelicans initial speed? vx dx 8.2 t vfY voY 0 aY -9.8 dY...
  8. J

    Horizontal Projectile Motion Question please help

    ohhhhh i think im getting that now...but then how would you find the initial velocity? it sounds like the easiest part but i still don't know how to fund it.
  9. J

    Horizontal Projectile Motion Question please help

    I found the time from d=vo(t) + 1/2 at^2 And never mind about the horizontal, because i found that with dx=vx(t) The part thats still tricking me up is the vertival...I've never seen v^2 + u^2 + 2as before so idk how else i would find it
  10. J

    Magnitude of the overall Velocity problem

    1. A plane drops a package from a height of 3230 m. The plane's horizontal velocity was 110 m/s at the instant the package was dropped. What is the magnitude of the overall velocity of the hamper at the instant it touches the ground? 2. d=vo(t) + 1/2at^2 3. dx vx 110 t 25.7...
  11. J

    Find the time the ball is in motion

    or one of the four equations for constant acceleration?
  12. J

    Find the time the ball is in motion

    i understand the x now, but i still don't understand the y...so would you use the free fall formula to find it or what?
  13. J

    Find the time the ball is in motion

    Yeah I used d=vo(t) + 1/2at^2 to find the time. so to find the horizontal velocity, I would use dx=vx(t), right? and then how would i go about finding the y?
  14. J

    Horizontal Projectile Motion Question please help

    Horizontal Projectile Motion Question...please help!! 1. A ball is thrown horizontally from the top of a building 22.8 m. high. The ball strikes the ground at a point 52.1 m. from the base of the building. a. Find the time the ball is in motion. b. Find the initial velocity of the ball. c...
  15. J

    Find the time the ball is in motion

    help please!!! 1. A ball is thrown horizontally from the top of a building 22.8 m. high. The ball strikes the ground at a point 52.1 m. from the base of the building. a. Find the time the ball is in motion. b. Find the initial velocity of the ball. c. Find the x component of its velocity...
Top