4.- Three point charges q₁ = 4.5 x 10-6 C, q2 = -6.4 x 10-6 C, q3 = -8.4 x 10-6 C placed as seen in figure 3. If m₁ = 8 x 10-5 Kg, l = 0.4 m, h = 0.2 m. Calculate the acceleration of mi if it starts from rest W -92 l +91 h -73
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