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The two forces that compress a spring inside a weighing scale are the force of gravity acting on the person standing on the scale and the reaction force exerted by the spring in the scale to counteract the force of gravity. This compression of the spring is used to measure the weight of the person.
The sum of the scale readings will always equal your total weight.
The reading on the scale would remain the same. Weight is a measurement of the gravitational force between you and the Earth, not the atmospheric pressure. Without the atmosphere, the force of gravity would still act on you, keeping your weight constant.
When the man pulls on his shoelaces while standing on the scale, the scale reading will not change. This is because the force he is exerting by pulling on his shoelaces is an internal force within his body and does not affect the normal force acting on him from the scale. The scale measures the normal force acting on the man, which is equal to his weight, regardless of any internal forces he may be exerting.
When you stand at rest on a bathroom scale, your weight is equal to the support force measured by the scale. The scale measures the force exerted by your body due to gravity acting downward, which is equal to the force exerted by the scale upward to support your weight.
The two forces that compress a spring inside a weighing scale are the force of gravity acting on the person standing on the scale and the reaction force exerted by the spring in the scale to counteract the force of gravity. This compression of the spring is used to measure the weight of the person.
Gravity and Support Force
You can measure the amount of gravitational force being exerted on your body by standing on a bathroom scale and weighing yourself.
The sum of the scale readings will always equal your total weight.
Gravity
The reading on the scale would remain the same. Weight is a measurement of the gravitational force between you and the Earth, not the atmospheric pressure. Without the atmosphere, the force of gravity would still act on you, keeping your weight constant.
When the man pulls on his shoelaces while standing on the scale, the scale reading will not change. This is because the force he is exerting by pulling on his shoelaces is an internal force within his body and does not affect the normal force acting on him from the scale. The scale measures the normal force acting on the man, which is equal to his weight, regardless of any internal forces he may be exerting.
When you stand at rest on a bathroom scale, your weight is equal to the support force measured by the scale. The scale measures the force exerted by your body due to gravity acting downward, which is equal to the force exerted by the scale upward to support your weight.
The support force of your scale is the same as your weight, but in an upward direction. If that were not so, the scale would be deformed (dented in) under your weight.
The support force of your scale is the same as your weight, but in an upward direction. If that were not so, the scale would be deformed (dented in) under your weight.
Philipp von Jolly invented the modern weighing scale in 1874.
Weighing scale is called "秤" (chéng) in Chinese.