Recent content by jumbo123

  1. J

    Civil Engineering - beam question

    Homework Statement (a) The total load applied to the beam and its direction (in kN) (b) The stress (σ) in each column given that Their cross-sections are solid square sections 10 x 10 mm (in MPa) (c) The strain in each column if the Young’s Modulus (E) of the steel is 207 GPa. (d) The...
  2. J

    What Are the Two Possible Launch Angles for a Ball to Land 5 Meters Away?

    What I don't understand is how to split to 10m/s into hortizontal and vertical components in order to get the time.
  3. J

    What Are the Two Possible Launch Angles for a Ball to Land 5 Meters Away?

    Homework Statement A ball is launched at a speed of 10ms-1. It lands 5m away. Find the two possible values of the angle, θ, which the initial trajectory makes with the horizontal. Homework Equations The equations of motion. The Attempt at a Solution I realize that I need to find...
  4. J

    Solving Projectile Motion Equations for Initial Velocity and Angle

    I have realized that I now have a triangle where the x component is u, y component is 19.8 and the hypotenuse is 3u. So I could easily work out u and then the angle by using simple trig. Is this correct?
  5. J

    Solving Projectile Motion Equations for Initial Velocity and Angle

    Homework Statement A ball is thrown horizontally with speed u from a height of 20m. It hits the ground with a speed 3u. Find the value of u, and the angle at which the ball strikes the ground. Homework Equations The equations of motion. The Attempt at a Solution I know that I must...