Recent content by Johnnie123

  1. J

    The potential difference of a proton

    1. Homework Statement A proton is released from rest at point B, where the potential is 0 V. Afterward, the proton: a. Remains at rest at B. b. Moves toward A with a steady speed. c. Moves toward A with an increasing speed. d. Moves toward C with a steady speed. e. Moves toward C with an...
  2. J

    How to find the acceleration due to gravity inside a planet?

    Consider a spherical planet of uniform density ρ. The distance from the planet's center to its surface (i.e., the planet's radius) is R. An object is located a distance R from the center of the planet, where R < Rp. (The object is located inside of the planet.) 1) Find an expression for the...
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