1.- A charge ?1 = −3 ?? receives an attractive force due to two charges ?2 = 8 ?? and ?3 = 7 ??, which are distributed as indicated in the figure. Determine the resultant electric force acting on ?1, as well as the angle it forms with respect to the horizontal axis.
Answer: ?? = ?. ?? ?, ? = ??. ?? °
2.- Three charges whose values are: ?1 = ?2 = 3 ?? and ?3 = −3 ??; are placed in the vertices of an equilateral triangle measuring 30 m each of its sides, as can be seen in the figure. Determine the value of the resultant force on the charge ?2, as well as the angle it forms with respect to the horizontal axis.
Answer: ?? = ?. ?? ?, ? = ??. ?? °
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