Physics, 18.04.2020 04:33 bmharris8262
A spiral staircase in a building is in the shape of a helix of radius 5 meters. Between two oors of the building, the stairs make one full revolution and climb by 4 meters. A person carries a bag of groceries up two oors. The combined mass of the person and the groceries is 70 kg and the gravitational force is 70g downward, where g is the acceleration due to gravity. Use a line integral to calculate the work done by gravity against the person.
Answers: 3
![W_g=\int_0^{4}Mgdz=Mg[4]=(70kg)(9.8\frac{m}{s^2})(4m)=2744Nm](/tpl/images/0610/0669/1e23a.png)
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A spiral staircase in a building is in the shape of a helix of radius 5 meters. Between two oors of...
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