Last year for Engineer's Week we made a catapult that used a garage-door spring to toss eggs and hit a target about 75 feet away. The catapult kit also comes with two different balls ping-pong and Wiffle® and enables you to adjust the number of rubber bands. Don't worry, we've all been where you are: we know what it's like. What is the speed and direction of the projectile at point A? It works perfectly, but the problem is I haven't found an ammo good enough to be fired constantly i. So this is our launcher, and it's the original design. And that's got two nylon washers and then two washers and two nuts and a lock washer on it. So we can tighten that down.
I already based mine off an air compressor. Use a curved trough to help centre it. Show all of your calculations in an H V chart. . In solving problems, you must figure out what the real issue or problem to be tackled is, come up with a strategy for investigating or solving it, then attack it with zeal and tenacity, then check and see if you have made real progress toward a solution.
The one fatal flaw that cost us was the sling, it needed a four point support system instead of just two. Anyone have any tips, suggestions on how I should go about this? A: Depending on the surface material you are clamping to, the single clamp provided with the catapult kit may not hold the catapult perfectly still, especially when using two or three rubber bands. You can look in the Bibliography or any high-school physics textbook for more information on these topics. You will use this information and your knowledge of physics to predict where the ball will land when it hits the floor. .
And so let's talk about this first. Using your experimental average range for 45º, calculate the launch velocity of your launcher. The completed project is a spectacular demonstration of the concepts of projectile motion. Having more turns of wire in your electromagnet strengthens its magnetic field for the same amount of electrical current, but increases its resistance -- it also makes the sparking problem worse. Students like Bryce, Kayla, and Caleb will be able to get actively involved making precise and accurate measurements, without waiting long to launch. Davis Drury High School , Mr.
Bibliography You can refer to the following references for more information about the physics principles involved in this project, as well as the original directions for the catapult kit from its manufacturer. It's a copper tube attached to an air compressor. When projectiles are released at an angle, their trajectory has unique horizontal and vertical behaviors. I am building a projectile launcher for school and was wondering what is the best way to go about it. You may want to restrain your projectile inside the coil while the current builds up, and then release it when the electromagnet is at its strongest. A bin size that is too small or too large will make it difficult to see the true shape of the distribution. But I think we should let you brainstorm a bit more on your own before giving too many hints.
Figure 1 shows a diagram of the setup for this experiment. Students can be asked to predict the outcome of various experiments. Now, the hacksaw leaves a rough edge, so we'll clean edge up with a break-off blade knife. Understanding projectile motion requires an understanding of position the location of the ball, or projectile , velocity how fast the ball is moving , and acceleration how fast the velocity changes. Students will derive and verify formulas.
Say a 30 cm ruler in your video appears to be 3 cm long on your computer screen. How are math and science related? There is a second hot-spot in the lower-right corner of the iFrame. I asked Nate to do the groundwork, based on his prior knowledge of the lab this semester. Edit: I was searching for catapult ideas and came across this, which I think would be a good place to start and modify a bit, in comparison to the catapult you made which was very accurate, are there any major deficiencies in this design? Conservation of Energy We are not finished yet, however — using Equations 8 and 10 requires that we know a few things — the height of the catapult above the ground, the angle at which the ball is launched, and its initial velocity. A pair of photogates in the launcher will help you measure the initial speed. How much time did it take to reach E? That's the way real life is. What was the slope of your graph? Trebuchets are plenty accurate, even more over long distances.
Students will defend their work using computer generated graphs and by presenting and demonstrating their results to their classmates and to the two local college Physics department members. Originally posted by Martyn It releases via an angled hook at the peak of the arms arc, and you aim it by trial and error, adding or subtracting weights. These equations rely on the assumption that we can ignore air resistance — otherwise, the acceleration would change over time, and not be constant. You could also make your projectile into a bolt and make a , then it would stick into the ground where it hit instead of rolling. Let me dig up a couple of pictures.
We cannot do that for you - well we could but. Trying to watch where the ball lands and simultaneously read the tape measure will be very difficult. Third exercise is quiz or homework where a woman has to jump out of a burning plane 300 meters above the ground without a parachute. Predicting the trajectory of a ball launched from the catapult requires an understanding of two fundamental physics concepts: projectile motion and conservation of energy. Students will be able to test their predictions! Catapults are good, but don't really take full advantage of the physics behind a giant falling mass. This demonstration is intended to be a tool to increase student performance on these types of questions.
Have you tried lubricating the inside of the tube? So we've got our cradle ready to go. There are parameters in both the theoretical predictions and the experiments that can vary slightly and affect your results. In our case, we are dealing with kinetic energy the energy an object with mass has according to its velocity and potential energy the energy that is stored in the rubber bands of the catapult. One student Teaching Assistant, Nathan, took the lead in writing a specific proposal for a full set of launchers here at Donors Choose. I can't push it all the way to the bottom because it gets stuck.