How close does the proton get to the line of charge

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Q. A brick is released with no initial speed from the roof of a building and strikes the ground in 2.70 {rm s}, encountering no appreciable air drag. How tall is the building? How fast is the brick moving just before it reaches the ground?

Q. An infinitely long line of charge has a linear charge density of 3.50×10^-12 C/m. A proton is at distance 18.0 cm from the line and is moving directly toward the line with speed 3000 m/s. How close does the proton get to the line of charge?

Reference no: EM1361188

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