3 years ago

Please help me I give 15 points.

Biology

2 answers:

KIM [24]3 years ago

8 0

The answer is number 1

Vera_Pavlovna [14]3 years ago

7 0

Answer:

Number 1 should be the answer.

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Two equal forces F have resultant of 1.5F .Find the angle between the forces

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Angle between the forces $= 82.82$ degrees

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The resultant force value $= 1.5$ times of Force F

$|R| = |F1| = |F2| =|F|$

Where R is the resultant force

$R^2 = A^2 + B^2 + 2AB cos X\\(1.5F)^2 = F^2 + F^2 + 2F^2 cos X\\2.25F^2 = 2F^2 + 2F^2 cos X\\$

Cos X is the angle between the two forces.

On further simplifying the equation we get

$2.25F^2 = 2F^2(1 + cos X)$

$(1 + cos X) = \frac{2.25F^2}{2F^2} \\(1 + cos X) = \frac{2.25}{2} \\(1 + cos X) = 1.125\\cos X = 1.125 - 1\\Cos X = 0.125\\X = Cos^{-1}0.125\\$

$X = 82.82$ degrees

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