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You stand on the large platform of a spring scale and note your weight. You then take a step on this platform and note that the scale reads less than your weight at the beginning of the step and more than your weight at the end of the step. Explain.
As you take a step on this platform, the scale reads the weight without the leg which you put outside the scale. So scale reads the weight which is less than your weight. At the beginning of step, the center of gravity of the body will tend to body in the forward direction. Then at the end of the step the body will exert an external force on the ground to maintain the balance. Thus weight of the body will increase and scale reads more than your weight.
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