How much work must this force do to stop the wheel. an, Ask an Expert

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Q. An electron moving along the x axis has a position given by x = 11te-1t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

Q. A uniform disk with a mass of 150 kg and radius of 1.3 m rotates with an angular speed of 1000 rev/min. A constant tangential force is applied at a radial distance of 0.7 m. How much work must this force do to stop the wheel?

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