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What is work, power and energy? State their role in sports with the help of examples. |
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Answer» Work: product of force and the amount of displacement in the direction of that force is work. To determine the amount of work done on an object, we should know: (a) average force exerted on the object (b) direction of this force (c) displacement of the object along the line of action of force during the time the force acts on the object. e.g., All isotonic movements of sports like bench press. pull-ups, etc. Power: It is defined as rate of doing work. It is the ability to perform large amount of work but as fast as possible. SI unit of power is watt. The power output depends upon the duration of activity. Less duration activity shows high power output. Energy: The capacity to do work is called energy. In sports mainly two types of energy are used. (a) kinetic energy. (b) potential energy Kinetic energy: It is the energy due to motion, e.g., basketball. Potential energy: It is the energy due to position, e.g, skiing. |
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