![]() ![]() ![]() This means the projectile will go faster and farther. The more force you apply by pulling back the rubber band on the slingshot, the bigger the force applied to the projectile. If you've ever launched something from a plastic spoon (hopefully not food at your brother or sister!), you might know that if you add more force by pulling the top of the spoon back farther, the projectile goes faster and farther. Think of the simplest type of catapult possible: a plastic spoon. ![]() How do you think force affects the speed of the Ping-Pong ball and the distance it travels? (Answer: More force means more speed and more distance.) The more force you apply to a catapult, the more force is applied to the object being launched. If we are trying to hit targets with the catapults, we need to discuss a few science concepts. Let's say we want our catapults to launch Ping-Pong balls at a certain target. These days, catapults are used for a variety of reasons, from toys to even launching planes and jets from aircraft carriers that have limited runway space! Who has heard of catapults? What do they consist of? (They consist of a lever and a wheel-and-axel.) What are catapults used for? (Listen to student ideas and experiences.) Originally catapults were designed for use during battles or wars. Like engineers following the engineering design process, before we begin designing or building, we must research catapults and learn as much as we can about them. We are preparing for an activity we will get to do very soon, during which we will design and build our own catapults. Today we are going to learn all about catapults and the important math and science concepts behind them. The better that humans collectively get at permaculture the more animals that will want to be our friends, as there becomes a mutualistic benefit to our interactions.Engineering Fun! Catapult Presentation Notes Answers (pdf) Visit [ to print or download. This is likely how we started the domestication process that got some wolves to become dogs. We could theoretically put our skills towards other animals well being effectively recruiting certain wild animals to guard our food for us. Permaculture is basically engineering the most ideal possible natural habitat for humans. Bald Eagles return to the same nesting area for life if the nest remains undisturbed, and if the tree falls, they will rebuild in the same area if the environment is healthy enough to support them.Ī wonderful indicator for ecological health is stable and healthy populations of apex predators like eagles, falcons, wolves, bears, and humans. Prune and train the highest branches as the ideal "welcome sign" for a new mating pair of native predatory raptors. The most ecological way to deal with the squirrel problem is to set-up the ideal nesting habitat/situation in the nearest largest species compatible tree. In less than 20 minutes, a squirrel stole over 200 black walnuts that we intended to plant strategically as part of an attempted food forest project. If you could scale this up to launch groundhogs, and somehow incorporate a self-resetting mechanism this could become something big! Of course, I should think about owls, considering the raccoon population of the city I live in. It will offer them a spectacular view of my raised bed garden in the back yard, and all the squirrels they can pluck from the mulberry trees and garage roof peaks. I am also building a perch for the local hawks on a pole about six to eight feet above my third-floor bedroom window balcony garden, with an appropriate perch profile and wrapping. ![]() I am currently trying to brainstorm a way to cast a moving hawk shadow, probably a silhouette pinned to a motorised clothesline activated by motion sensor, but first I think I am going to try an outdoor speaker and motion sensor setup, with the speaker playing a hawk shriek any time the sensor is triggered. On a serious note, are there any guardian animals that squirrels do take seriously? I mean, they disappear whenever the Red-Tailed Hawks soar by, and I know that they are preyed upon, as I have seen, on many occasions, Red-Tailed Hawks munching on squirrel perched atop electrical poles. Is it bad that I want to see video of the Squirrel Electric Slide? Those little fuckers just won't leave my bean seedlings alone. ![]()
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