28.1 Conservation of Energy in Charge Interactions Learning Goal To practice Pro

Question

28.1 Conservation of Energy in Charge Interactions Learning Goal To practice Problem-Solving Strategy 28.1 for change interaction problems. A proton and an alpha partice are at rest at a distanoer from each other. They then begin to move apart. Find the speed of the proton by the time the distanoe between the proton and the alpha particle doubles. Both particles are positively charged. The charge and the mass of the proton are, respectively, e and m. The charge and the mass of the alpha particle are, respectively, 2e and 4m. the electric potential given in the problem statement? If not, you'l need to use a known potential, such as that of a point charge, or calculate the potential using the procedure given in Problem-Solving Strategy 29.2. of all moving partides. Kr and Ki are the sums of kinetio energies Some problems may additional conservation laws, such as conservation of charge or need conservation of momentum. ASSEss: Check that your result has the correct units, is reasonable, and answers the question Model The partides described in this problem interact under the effect the electrio foroe, which is a conservative force, so the system's mechanical energy is conserved. Visualize Part A Which of the following quantites are unknown? A initial separation of the partides F, final speed of the alpha particle B final separation of the particles G, mass of the proton C initial speed of the proton H, mass of the alpha partiole D, initial speed of the alpha particle charge of the proton E final speed of the proton J. charge of the alpha particle Enter the letters of all the correct answers in alphabetical order, Do not use commas, For instance, if A, C, and D are unknowns, enter ACD,

Explanation / Answer

C)A proton has an initial speed of 3.9 105 m/s

D)An alpha particle with an initial speed of 7.15x10^4 m/s

G)Mass: 1.672621777(74)

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