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Starting from rest, a woman lifts a barbell with a constant force F through a distance h, at which point she is still lifting, and the barbell has acquired a speed v. Let Ewoman stand for the following energy terms associated with the woman: Ewoman Echemical, woman + Kwoman(moving arms etc.) + Ugrav, woman+Earth + Ethermal, woman The change in the kinetic energy of the barbell is (1/2)my2-0 = (1/2)m. sys The general statement of the Energy Principle is AE = Wext. We'll consider terms on the left side of the equation (the Esys side, changes in the energy inside the system) and terms on the right side (the Wext side, energy inputs from the surroundings). Your answer is incorrect. Try again. For the system consisting of the woman, the barbell, and the Earth, which of the following terms belong on the left side of the energy equation (the AEsys side)? (1/2) my +mgh -(1/2) mv none of these terms (left side is 0) AEwoman -Fh Fh -mgh For the system consisting of the woman, the barbell, and the Earth, which of the following terms belong on the right side of the energy equation (the Wext side)? -mgh Fh +mgh CAEwoman C-Fh (1/2) m C -(1/2) mv none of these terms (right side is 0) Your answer is partially correct. Try again. For the system consisting of the barbell only, which of the following terms belong on the left side of the energy equation (the AEsys side)? C Fh -mgh C +mgh 0 none of these terms (left side is 0) C -Fh (1/2) my C -(1/2) my CAEwoman Starting from rest, a woman lifts a barbell with a constant force F through a distance h, at which point she is still lifting, and the barbell has acquired a speed v. Let Ewoman stand for the following energy terms associated with the woman: Ewoman Echemical, woman + Kwoman(moving arms etc.) + Ugrav, woman+Earth + Ethermal, woman The change in the kinetic energy of the barbell is (1/2)my2-0 = (1/2)m. sys The general statement of the Energy Principle is AE = Wext. We'll consider terms on the left side of the equation (the Esys side, changes in the energy inside the system) and terms on the right side (the Wext side, energy inputs from the surroundings). Your answer is incorrect. Try again. For the system consisting of the woman, the barbell, and the Earth, which of the following terms belong on the left side of the energy equation (the AEsys side)? (1/2) my +mgh -(1/2) mv none of these terms (left side is 0) AEwoman -Fh Fh -mgh For the system consisting of the woman, the barbell, and the Earth, which of the following terms belong on the right side of the energy equation (the Wext side)? -mgh Fh +mgh CAEwoman C-Fh (1/2) m C -(1/2) mv none of these terms (right side is 0) Your answer is partially correct. Try again. For the system consisting of the barbell only, which of the following terms belong on the left side of the energy equation (the AEsys side)? C Fh -mgh C +mgh 0 none of these terms (left side is 0) C -Fh (1/2) my C -(1/2) my CAEwoman
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