Question

1) A point charge Q1 = +4.4 μC is fixed in space, while a point charge...

1) A point charge Q1 = +4.4 μC is fixed in space, while a point charge Q2 = -3.3 nC, with mass 6.3 μg, is free to move around nearby.

a) Calculate the electric potential energy of the system, in joules, when Q2 is located 0.44 m from Q1.

b) If Q2 is released from rest at a point 0.44 m from Q1, what will be its speed, in meters per second, when it is 0.19 m from Q1?

2) Two point charges Q1 = Q2 = +1.8 μC are fixed symmetrically on the x-axis at x = ±0.066 m. A point particle of charge Q3 = +4.4 μC and mass m = 13 mg can move freely along the y-axis.

a) If the particle on the y-axis is released from rest at y1 = 0.021 m, what will be its speed, in meters per second, when it reaches y2 = 0.067 m? Consider electric forces only.

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