flyingpig
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But the object isn't in space...it's in the sky. Which is less than the Earth's Radius.
The discussion revolves around calculating the speed of a charged particle as it approaches a spherical insulator with charge +Q and radius R. The participant initially attempted to use the work-energy theorem with incorrect limits of integration, integrating from 2R to R instead of from infinity to R. The correct approach involves understanding that the potential energy decreases as the particle moves closer to the insulator, leading to an increase in kinetic energy. The participants clarify that integrating from infinity is not necessary for this specific problem, as the work done can be calculated directly between the two points.
PREREQUISITESStudents studying electromagnetism, physics educators, and anyone preparing for exams in electrostatics or related fields.
Note that the distance 'r' in the Newton formula for gravity is the distance from the object to the center of the earth. For something above the Earth's surface, that distance will be greater than the Earth's radius.flyingpig said:But the object isn't in space...it's in the sky. Which is less than the Earth's Radius.
The Earth's surface is below the sky.flyingpig said:But the Earth's surface is the sky and the object can't always be higher than the sky