Recent content by jllorens

  1. J

    Easy Question: Formula for Launch Angle? Projectile Motion.

    It seems to me that there are too many unknowns. I have the trajectory equation down, I can get the right angle to hit any target at any elevation (assuming it is within range) with a mortar shot (high angle shot as opposed to low angle). But the target leading seems to require a "guess...
  2. J

    Easy Question: Formula for Launch Angle? Projectile Motion.

    Edit: I solved my problem for launch angle. So now I have another question. I am writing a script for a cannon in a video game that will aim at XYZ coordinates by determining the angle and bearing needed to launch the projectile to hit the target. I wish to add a target-leading formula so...
  3. J

    Finding Acceleration in two Force problems

    The correct answer for the tension in the string however is 19.175. If the opposing tensions canceled, would that not mean that the tension in the string is 0? I got 19.175 when I multiplied M1 times a, the force of block 1 (the block on the table). I am not sure, however, why that is.
  4. J

    Finding Acceleration in two Force problems

    I am having trouble understanding what you did here.
  5. J

    Finding Acceleration in two Force problems

    1. Homework Statement for problem 1 A 2.50 kg object placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging 9.00 kg object, as shown in the figure. Find the magnitude of the acceleration of the two objects and the tension...
  6. J

    HOmework : Addition of Vectors by Means of Components

    Your method is correct, but if the numbers are wrong, your calculator could indeed be set on the wrong setting. Make sure it is set to "Degrees" and NOT "Radians." On a TI-83, this can be done by punching the "MODE" button and then selecting "Degrees."
  7. J

    I can't seem to understand 1d motion.

    Thank you for the prompt replies. One more question. I have encountered two equations for average velocity, one of which seems more logical to use. If this is incorrect, I will use the other. Is the average velocity from t=0 to t=5: Using the equation for average velocity: Dx/Dt=Vavg -9...
  8. J

    I can't seem to understand 1d motion.

    1. The problem statement I am studying for an upcoming test and I am having a lot of trouble relating velocity, acceleration, and displacement vs time. Given a position vs time function: x(t) = 6m - (8m/s)t + (1m/s^2)t^2 I cannot for the life of me understand how to find any instantaneous...
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