I've built a trebuchet catapult and have been firing plastacine down the corridor in the name of scinece. I'd like to know any simplish parabolic motion equatins? Oh and they'de be even better if they didn't need a value for initial velocity because I cant figure out how to work that out either.
Basically, I'd like to be able to predict where the projectile is going to land before it ever gets there and then to compare that with the actual experimental results that I have. Any help would be greatly appreciated. Thanks all from a very weary A2 level student.
2006-12-18 08:04:06 · 6 answers · asked by Moi? 3 in Science & Mathematics ➔ Engineering
Tell you what, how about you do your own homework.
2006-12-18 08:19:26 · answer #1 · answered by thecoldvoiceofreason 6 · 0⤊ 1⤋
Sorry, but you will need to know the distance from the ground/floor, the angle at which you "fling" your object, and the mass of the object flung as well as the initial velocity. You can determine this by using a stopwatch on the large arm, knowing the distance to the lever that holds your ammunition, the angle that this arm goes thru until it stops; now that is the tangential velocity at the end of the arm. The bag that holds your ammo is also a lever arm; know this distance and use your timer to--looking only at the bag now--determine the angle and time until the bag stops. It is a little rough but I have done it fairly accurately. A good polaroid camera will allow you to determine the motion angles.
2006-12-18 13:40:49 · answer #2 · answered by kellenraid 6 · 0⤊ 0⤋
parabolic equations should be easy to find online. But, if you have a machine that can throw projectiles all day long, you can determine the initial velocity by experiment. Just shoot the balls 100 times and mark where they land, and have someone help you. It might be easiest if the catapult launches the ball from ground level, so that it launches and lands at the same Y coordinate.
2006-12-18 12:29:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
you are going to choose the launch velocity.you ought to be waiting to get this by using test. Set the trebuchet as much as launch the projectile at 40 5 tiers and locate the variety. Then the launch velocity is sqrt(variety x g). the variety is R=(u^2)sin2(theta) over g. yet to do it perfect you elect degree point maths
2016-12-15 03:42:58 · answer #4 · answered by tollefson 4 · 0⤊ 0⤋
perhaps you should obtain the mass atomic weight of your projectile, and incorporate it in the formular when you determine the distance it travels. Re-read your assignment because you seem lost in your thought.
2006-12-18 08:42:06 · answer #5 · answered by Krumah 1 · 0⤊ 1⤋
Google "trajectory formula" and it will take you to it, in Wikipedia. I don't know how to set it out here.
2006-12-18 12:23:46 · answer #6 · answered by andrew f 4 · 0⤊ 1⤋