If you can determine from the experimental data, the maximum height of each subsequent bounce, you can easily determine how much energy was lost upon the previous contact with the ground.īut again, that's probably a nice, but irrelevant, exercise. when the first bounce completes and the ball hits the ground again, it loses more momentum/energy and bounces again to another lower max height. therefore, the highest point of the next arc must be lower than the height of the initial drop. If the first drop of the ball fits the equations, on the first bounce it will rebound to a lower height (i.e., lower energy level) due to the lost energy of the collision with the ground. Have you ever turned a liquid into a solid just by tapping on it In this experiment you make just. Where does the concept of "the initial height increases" come from?Įmpirically, if you bounce a ball, the "free fall" part of the bounce, which i'll take to mean, "from the apex of each parabolic arc until it hits the ground", the apex would be lower each time because of air resistance (which we could neglect as a first-order effect) and also due to momentum lost by the inelastic collision of the ball with the "ground" at the bottom of each bounce. Lumpy Liquids and Squishy Solids + Make a bouncy Ball. I know I'm missing something here, but can't figure out what. This doesn't make sense since they should be decreasing if they represent initial velocity and height. is half of the acceleration due to gravity, which you may take as 32.2 ft. Then I am to related this equation to the one for motion of a falling object y = yo + v0t + 1/2gt^2 and interpret the meaning of each parameter.īased on this a is the acceleration due to gravity, b is the initial velocity, and c is the initial height.īut looking at the actual data collected for the ball bouncing, the numbers for b, and c are increasing with each bounce. CS177/457 C++ Programming Lab 5: The Bouncing Ball Your task is to model the. Since you could only estimate the height of each apex to the nearest 0.05 meters, you should express the value for your experimental g to only two decimal places. (Excerpted from Bouncing Balls by Porter Johnson, Physics Department. I have been told to fit each free-fall interval using the quadratic equation which will give the values of a,b and c for y=ax^2+bx+c. Calculate the acceleration due to gravity by using the kinematics equation s v o t + at 2 and isolate the second half of the golf ball's bounce. mgh, where m is its mass and g is the acceleration due to gravity. Projectile Motion Lab Purpose Determine the initial velocity of a ball launched horizontally Predict and verify the range of a ball launched at an angle Equipment Computer with Excel Projectile Launcher and plastic ball Plumb bob (optional) Carbon paper 1 sheet White paper 2 sheets 1 6 C-clamp Clipboard Large binder clip Meter stick Ruler Masking tape Cell phone with level app Lab jack Theory To predict where a ball will land when it is shot at some angle above the horizontal. Any help would be most welcome.I'm working on a lab of a bouncing ball. I've tried to figure out the problem but I just can't see it. Introduction: For this first lab we look at the behavior of objects moving in one dimension under the influence of gravity. The gravity actually works fine for a while but then once the bounces get really small the animation becomes erratic for a very short time then the position of the ball just constantly decreases. The original program worked fine but now I have tried to add gravity into the program. The program is just a simple bouncing ball that will drop and hopefully bounce for a while. This is probably a really basic problem but I can't seem to find any other articles on it.Īnyway, I have written a small bouncing ball program in Java to try and expand my basic skills. Haptic Paddle Ball was built to teach students about the effects of changing slack length, damping and spring constants on ball bouncing dynamics and.
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