Part A Charge Q-6 00 is distributed uniformly over the volume of an insulating s

Question

Part A Charge Q-6 00 is distributed uniformly over the volume of an insulating sphere that has radius R-140 cm . A small sphere with charge q = + 3.00 C and mass 6.00. × 10 5 kg is projected toward the center of the large sphere from an initial large distance. The large sphere is held at a fixed position and the small sphere can be treated as a point charge. What minimum speed must the small sphere have in order to come within 6.00 cm of the surface of the large sphere? Express your answer with the appropriate units. | Value Units Submit My Answers Give Up Continue

Explanation / Answer

we will use conservation of energy,

initlal KE + Initial pE = final KE + Final pE

1/2 ( 6 x10^-5) v^2 = 9x 10^9 (6 x 10^-6) (3x 10^-6) / (0.14 + 0.06)

3 x 10^-5 v^2 = 810 x 10^ -3

v^ 2= 270 x 10^ 2

v= 1.643 x 10^2 m/s apprx

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