What A Drag! Difficulty. Time Required. Very Short (. Use caution when working near the swimming pool. Abstract. What makes some objects more streamlined than others? Find out which ordinary objects around your house are made to move smoothly through the water in this easy science fair project. Which objects will produce the most drag when pulled through the water? June 2. 01. 7. < https: //www. NOTE: Test agents switched from IE 9 to Chrome as of March 1 2016. Choose URLs. TO DO & NOTICE: Fill in your weight below in the space indicated. You can enter your weight in any unit you wish. Click on the "Calculate" button. But in reality, moving objects are constantly fighting to balance the forces around them. Moving objects have four main forces that act upon them: lift, weight, thrust, and drag (FI, 2. The aerodynamics of this airplane are due to the balance of four forces: lift, weight, thrust, and drag (FI, 2. The drag on an object is a combination of friction and pressure. Air moving over the surface of an object causes drag due to friction. Higher- pressure air in front of an object pushes back on it more than lower- pressure air behind it, which causes drag due to pressure. The combination of the two is just called . An object moving through water also experiences drag for the same reasons. The force of drag is important for both the aerodynamics and the hydrodynamics of a design. In this science fair project, you will test how much drag ordinary objects produce when pulled through the water. You will make a simple device to measure the drag by using a pull- scale and fishing line. After testing different objects around your house, will you be able to find out what types of objects move smoothly through the water? Which shapes are the most aerodynamic and the most hydrodynamic? Terms and Concepts. To do this type of science fair project, you should know what the following terms mean. Have an adult help you search the Internet, or take you to your local library to find out more! Bibliography. The Franklin Institute. Forces of Flight. Retrieved December 1. The Franklin Institute. Forces of Flight - Drag. Retrieved December 1. Andrew Rader Studios. Motion Basics. Retrieved December 1. Motion: Vectors. Retrieved December 1. Wacky Water Fun with Science, New York, NY: Mc. Graw- Hill. Just Plane Smart! Activities for Kids in the Air and on the Ground, New York, NY: Mc. Graw- Hill. For help creating graphs, try this website: Materials and Equipment Scissors Fishing line Leader line Spring scale Swimming pool Fishing swivels Objects to test, with the following features. You should use several different types and sizes of each. They should not be so large that they are difficult to handle. They should all be waterproof, because you will be submerging them in a pool of water. For example, choose a baseball instead of an air- filled ball so that it will sink. Use objects of the following shapes: Spheres (baseball, grapefruit, orange, etc.)Rectangular shapes (cubes, plastic blocks, boxes, brick, etc.)Circular shapes (Frisbee, plate, CD, etc.)Irregular shapes (toy, pipe, hammer, jar, boomerang, etc.) Lab notebook. Minnesota Mom of Two Diagnosed with Cancer Hours After Husband Dies From ALS: 'I'm Not Ready to Give Into It'. For your protection this website is secured with SSL encryption and a $50,000 guarantee from Network Solutions. Graph paper. Experimental Procedure Select several objects that you want to use for your science fair project, as described in the Materials and Equipment list. Wrap fishing line securely around each object. Make a loop out of fishing line at the leading edge of the object and attach a swivel hook. This will be where you attach the leader of the spring scale to each object. Have an adult help you, if necessary. It should be long enough for your object to reach down into the pool as you are walking along the edge of the pool, and while you are holding onto the spring scale handle. The visible part of the electromagnetic spectrum can be separated into different colors: red, orange, green, blue, and violet. Objects that do not absorb any of these. Body image: What is it? Body image is how we feel about our bodies. For many people today it is a big issue that affects how they think and feel about themselves as a. Want to learn to throw a perfect spiral or how to hit a curve ball? If you are looking to lose weight fast and safely, you’ve come to the right place. This article features proven tips that are based on scientific research and. Updated on 5/28/2017. Are you looking for the Best weight loss pills on the market Today? For many years now weight loss was a woman dominated industry but no longer. Feel better from the inside out. Weight Watchers Your Way Program is a holistic approach to weight loss tailored to suit your lifestyle. You’ll fall in love with. Attach an item to the leader line of the spring scale. Do a test to measure the drag on the object. Drag can depend on how fast an object is moving, so to make an equal comparison between each object, you need to move them at the same speed. You should try to make sure that the leader line is as close to horizontal as possible while you are towing the object. This ensures that the spring scale is mostly measuring drag force (which acts in the horizontal direction), and not any contributions from the object's weight, hydrodynamic lift, or buoyant force, which all act in the vertical direction. Look at the spring scale and record the drag on the object (in newtons) in a data table in your lab notebook. Remember to try and walk at a constant pace. The spring scale reading might still bounce around slightly — try to take a middle- value reading if this happens. Record all data in your data table. Make a graph of your data, either on paper, or with a website, such as Create a Graph. A bar graph will work well for this type of experiment. Make a scale of the force of drag, in newtons, on the left side of the graph (y- axis) and order your differently shaped objects on the bottom of the graph (x- axis). Draw a bar for each item up to the matching force of drag measured in the pool with the spring scale. Be sure you remember to label the axes and the bars of your graph, and to give your graph a title. Which object caused the most drag? If you compare across objects of different shapes, are some shapes better than others? If you compare within a group of similarly shaped objects (for example, all spheres) are some sizes better than others? Variations In this science fair project, the items you chose are not of the same shape or size. This means that they may also have different weight and volume. Measure the volume of each object by submerging the objects in a tub or bucket with marked volumes and calculate the difference in water level before and after. Measure the weight of each object by using a kitchen scale. Will the weight and volume of your objects help explain your results? Another factor in the aerodynamics or hydrodynamics of an object is the orientation of the object. Is the object moving forward, backwards, sideways, up, or down? You can use the same object in each experiment, but change the orientation, or direction, of the object as it moves through the water. Will the object be more or less dynamic when in different orientations? If you're interested in a more mathematical explanation of your results, try looking up references for the drag equation and thinking about the objects' cross- sectional areas and drag coefficients. Ask an Expert. The Ask an Expert Forum is intended to be a place where students can go to find answers to science questions that they have been unable to find using other resources. If you have specific questions about your science fair project or science fair, our team of volunteer scientists can help. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot. Some of their watercraft designs are enormous, like merchant ships, which carry huge loads of oil, cars, food, clothing, toys, and other goods, across thousands of miles of open waters. These ships are essential for trade between countries. Other vessels are smaller and more specialized, like luxury yachts or cruise liners. Still others are designed for military purposes. They design, build, and test vehicles like airplanes, helicopters, balloons, rockets, missiles, satellites, and spacecraft. They build, test, and maintain parts for air and spacecraft, and assemble, test, and maintain the vehicles as well. They are key members of a flight readiness team, preparing space vehicles for launch in clean rooms, and on the launch pad. They also help troubleshoot launch or flight failures by testing suspect parts. It's not as smart as you are, and it may occasionally give humorous, ridiculous, or even annoying results! Learn more about the News Feed. Looking for more science fun? Try one of our science activities for quick, anytime science explorations.
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