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# This Is An Essay On The Biomechanics Of Tennis Racquet, How The Technology Of A Tennis Racquet Has Evolved And How To Choose The Right One.

1099 words - 4 pages

When selecting a Tennis Racquet there are many factors to take into account like, length, mass, weight, elasticity and feel. The aim of this report is to study the biomechanical principles associated with all these factors like; mass, radius, moment of inertia, ease of rotation, speed of rotation, forces, design, construction, elasticity, feel and balance.The first thing to know about a tennis racquet is that it is an extension of the arm which is a third class lever, that is axis - force - resistance. In this case the shoulder is the axis, the biceps and the flexor digitorum are the force and the ball hitting the racquet is the resistance.When is comes to the mass and weight of the racquet you want a racquet with the biggest mass that you can control and a fairly low weight. The bigger the mass means the more area there is to hit with. The more area there is to hit with means you get a bigger 'sweet spot' which is the ideal place for the racquet to make contact with the ball. The lighter the weight the easier it is to swing and you will have more control over the racquet. This is important when you need to respond quickly to a shot, eg. volleying a forehand drive. If you have a light racquet but not so good reflexes you will still be more efficient than the fastest reflexes with a heavy racquet.The resistance arm is the distance from the axis to resistance, the radius. It is important to get a racquet that makes this distance as long as possible without losing any control over the racquet. The importance of having a long resistance arm is so that the speed of rotation is as fast as possible. When the lever is longer you don't have to put in as much effort to make the head of the racquet rotate faster around the axis. This then generates more velocity that can be transferred to the ball when the racquet makes contact.The moment of inertia is very important; it is the moment at which the racquet and ball connect and the velocity in the racquet is transferred to the ball so it is important to have the racquet head at top speed at this moment. To get a greater moment of inertia you need a greater angular motion. To get this the racquet would be as heavy as possible and the resistance arm would also be as long as possible while still being in control of the racquet. There are also some design techniques involved in moment of inertia. There are weights put in the head of the racquet so that it is easier to generate a greater angular motion which results in a greater moment of inertia.It is important for the racquet to be easy to rotate around the axis. This is done by making the racquet lighter and shorter. Although this is important it is more important to be able to generate more power to transfer to the ball. Therefore you need to build up muscles to be able to manage a large, long racquet. You need to find the right balance of ease of rotation and angular motion.The speed of rotation is more important...

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