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Igoryamba
3 years ago
11

Three equal 1.60-μCμC point charges are placed at the corners of an equilateral triangle with sides 0.800 mm long. What is the p

otential energy of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.) Express your answer with the appropriate units.
Physics
1 answer:
Pepsi [2]3 years ago
3 0

Answer:

= 0.086J

Explanation:

we are given three equal charges q₁ q₂ q₃ = 1.60 μC

sides of triangle = 0.800m

U = 1/4πε₀(3q²/r)

1/4πε₀ = 9.0 × 10⁹ N.m²/C²

U = 9.0 × 10⁹ ((3 * 1.60 × 10⁻⁶)² / (0.800))

= 0.086J

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Answer:

75 rad/s

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Given that: α (t) = (6.0 rad/s4)t² = 6t² rad/s⁴. Hence:

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At θ(t) = 10 rev = (10 *  2π) rad = 20π rad, we can find t:

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t = 3.348 s

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ω(t) = 2t³

ω(3.348) = 2(3.348)³ = 75 rad/s

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