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A ballistocardiographic scale is essentially a very sensitive scale to measure and record a patient's apparent...

A ballistocardiographic scale is essentially a very sensitive scale to measure and record a patient's apparent weight. The patient stands upright on the scale. As his heart beats, his apparent weight changes as a result of the acceleration of the blood in the vertical direction. In a typical case, a patient's mass is 64 kg. His heart pumps about 0.074 kg of blood on each contraction into the aorta, reaching a maximum upward velocity of 1.2 m/s in 0.14 s. Estimate the change in apparent weight (in N).

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