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aleksklad [387]
2 years ago
11

A conservative force on a particle moving along the x axis is given by F = (3x^2-2x)i. Which of the following is a potential tha

t is associated with this force?
A. (6x-2)i
B. (-6x+2)i
C. x^3-x^2+3
D. -x^3+x^2+3
E. No answer given above is correct.
Physics
1 answer:
ANTONII [103]2 years ago
5 0

pck u

report me if you can

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Answer:

The answer is C. Resistance

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A student sits on a freely rotating stool holding two weights, each of mass 3.10 kg. When his arms are extended horizontally, th
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Answer

Give that,

mass of two student m = 3.10 kg  

distance from the axis of the rotation is r = 1 m

angular speed ω = 0.754 rad /s  

moment of inertia I = 3.10 kg m²

position from the rotation of the axis is r_1 = 0.29 m

Total moment of inertia I '   = I + 2 m r²

                                          = 3.1 +2 x 3.1 x( 1)^2  

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moment of inertia inward horizontally from the position of rotation axis is  

                                   I"   = I + 2 m r^2  

                                         = 3.1 + 2 * 3.1 kg ( 0.29)^2  

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a ) new angular speed is ω_1 =\dfrac{I'\omega}{I''}

                                               = \dfrac{9.3\times 0.754}{3.62}  

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K.E = \dfrac{1}{2} I'' \omega_1^2

K.E = \dfrac{1}{2}\times 3.62 \times 1.92^2

K.E =6.67\ J

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