﻿ 1. What direction is the torque for a moment arm, r, which points east and an applied force, F, which points south? - Essay solutions

## 1. What direction is the torque for a moment arm, r, which points east and an applied force, F, which points south?

1. What direction is the torque for a moment arm, r, which pointseast and an applied force, F, which points south? (I.e. you are trying to loosing a nut, the wrench points east from the nut, and you push south on the end of the wrench.)2. The mass of the Earth is about 6×1024 kg and its radius is about 6×106 meters. Suppose you build a runway along the equator, line-up a million F-16’s, bolt them down, and have them all fire their engines (eastward) simultaneously for 1/2 hour. Estimate the effect that would have on the rotational speed of the Earth. Assume the thrust of each plane’s engines is 30,000 lbs = 133,000 Newtons. Science Physics PHYS 1401

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