Projectery :: essays research papers

ProjecteryDiagramMethodThe A3 sheet of white paper was prone to the board, with drawing pins, and the board was placed underneath a book, to position it on a slight incline. Using a protractor, lines were drawn on as a guide for where to line up the stain. The lines were drawn at 30 O, all the way to 70 O, at 5O intervals. A runner was needed to drop the marble down to the inclined board. A piece of card was used, that was bent in half to create a trail. Wherever the marble went off the board, was marked. The result was sustain by measuring from the point the marble was thrown to the point it fell of the board.We produced the test a couple of times to find the best results.ResultsAngle clench (cm)30 O24.335 O25.940 O26.645 O27.050 O27.855 O26.860 O24.665 O20.670 O18.2ConclusionPrediction At 45 degrees the marble will travel the longest.At 45 O the vertical speeding and the horizontal velocity are the same.ExampleIn the vertical direction the object decelerates at 10ms-2(approx ).It will take exactly 1 second for it to impinge on its maximum height. This is because of the following. 10ms-2 means every second velocity decreases by 10ms-1. It will take half a second to decrease by 5ms-1. Therefore, 5/10 = 0.5, Decrease in velocity / deceleration. 2 x 0.5 = 1second.During this one second, the object will travel a horizontal distance. Range = horizontal velocity x time= 5 x 1= 5mThe try out that has been undertaken here has gone slightly off course simply because of the prediction being 45 O. This experiment has shown that it reached its height at 60 O, which could have been interrupted by several things. The things that could have altered the final results are the followingThe runway may not have been perfectly on level with the lines of angle.The board wasnt at same height.The speed of movement at the beginning from the marble.The runway wasnt steady.The runway may have been at different heights.To produce a fairer test, an average could have been taken, o r a more suitable runway. I believe that a bigger board and easier lines to follow would have made it much easier and more accurate.How applied to sport?Projectery is used in almost every sport, e.g.Javelin When throwing the javelin.Shot put When throwing the shot put.Football When kicking the ball.Projectery is used in sport as many use this to judge the best way to be able to commence the distance that they want.