Does a weightlifter do work as they lift a barbell overhead? Is work done as they hold the barbell motionless over their head?BoldItalicUnderline
Question
Does a weightlifter do work as they lift a barbell overhead? Is work done as they hold the barbell motionless over their head?BoldItalicUnderline
Solution
Yes, a weightlifter does work as they lift a barbell overhead. In physics, work is defined as the force applied to an object times the distance over which it is applied, and it is directed in the direction of the force. When a weightlifter lifts a barbell, they are applying an upward force to the barbell over a certain distance, which means they are doing work on the barbell.
However, when the weightlifter is holding the barbell motionless over their head, they are not doing work on the barbell according to the physics definition of work. Even though the weightlifter is exerting a force to hold the barbell up, there is no displacement of the barbell in the direction of the force. Therefore, the work done on the barbell is zero when it is being held motionless overhead.
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