D:\Robert\Research\Expertise\hawkeye final submission.doc 14 November 2011 17:03 You cannot be serious! Public Understanding of Technology with special reference to `Hawk-Eye.’ Harry Collins and Robert Evans An edited version of this paper will be published by Public Understanding of Science 17‚ 3‚ July 2008. Public understanding of science‚ though it approaches the specialist knowledge of experts only in rare circumstances‚ can be enhanced more broadly in respect of the
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creators of tennis are the Europeans monks. As you can guess‚ the racket was not yet uses at this time. They were hitting the ball with their hands‚ and then they were wearing leather gloves. A big step came when the first ‘racket’ appeared. Thus‚ progressively (in course of time)‚ the racket evolved as well as the ball. To begin with‚ the ball was wooden. Currently the ball is in rubber‚ filled of air and covered with felt. About the racket‚ they also were wooden and very heavy compare to now. Right
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Activity 1 Summary How to hit a Kill Shot: You want to get good position in the middle of the court and try hitting with power some balls very close to the floor. The reason for this is that you want the ball to bounce so your opponent has to react to a low‚ bouncing ball. This is an effective shot that can put you in an offensive position on your opponent. Benefiting Children: This move will help children learn racquetball by teaching kids one of the best offensive shots in racquetball. This
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velocity of a ball to get the experimental g. We then measured reaction time with a ruler. We used our data and g‚ to get an average distance and time. Report Questions 1. The parabolic curve opens upward in the position vs. time graph‚ because this graph is measuring the position of the ball from the sensor. The ball is at first falling down and then bounces back up. This would cause the ball to move away from its original position‚ downward‚ and then as it hits the floor and bounces back up the
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CLASSTEST1 20 FEBRUARY 2013 DURATION: 1 HOUR MARKS: 55 Answer ALL the questions in the ANSWER BOOK. This question paper consists of TWO sections: SECTION A SECTION B You may use a non-programmable calculator. You may use appropriate mathematical instruments. Number the answers correctly according to the numbering system used in this question paper. SECTION A QUESTION 1: ONE-WORD ITEMS Give ONE word/term for each of the following
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This article deals with some of the basic Biomechanics involved with a Table Tennis Stroke. It breaks down the stroke into three components. 1. Backswing 2. Contact with ball 3. Follow-through The Role of the Backswing Key elements for timing and power production. the back-swing plays the primary role within all stroke techniques. It sets the stage for power production as well as provides the key element in establishing the proper timing of the stroke. Basic Biomechanical Principals Involved
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In this scene‚ the soccer ball was kicked by a player with a tremendous force. The Lightning hand Goalie (Forth Brother) stops the ball‚ but fly back because of the reaction force.This scene is an example of bad physics because it is unrealistic that a human can actually take off/fly after been hit by a soccer ball. Let us assume the following:-A soccer ball is usually weight 15 pounds = 0.4kg in Fifa games -We can’t simply calculate the velocity of the ball that the guy kicked in the movie. So
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To conduct our experiment‚ we used a meter stick on concrete and a tennis ball. We dropped the ball by intervals of ten from 40-100 centimeters above the concrete. To get the average ball-drop height‚ we dropped the ball three times from each height‚ found the mean. Our Y value represents the average bounce heights in centimeters and X represents the drop height in centimeters. We created a scatter plot to show our data (below). The line of best fit went through the points (80‚48.3) and (90‚54.3)
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first SCORING A player scores a point when his opponent commits one of the following errors: • He isn’t able to return the ball. • He returns the ball outside the opposite side of the table. • He lets the ball bounce more than once in his own court before returning it. • He touches the ball several times successively. • He strikes the ball in volley (without it bouncing on the table) above his side of the table. • He moves the table during play. • He touches
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a tennis ball. When it comes to the game of tennis it is very serious. So before going out onto the court everything has to be perfect. So many people have wondered if it is good to heat or cool a tennis ball. Well that decision is up to the player. Some of the effects of heating the tennis ball is the increase of air flow. The reason this happens is because when the temperature rises so does the pressurized air inside of the tennis ball. Which just boils down to a lighter ball. So if the
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