1. (25 pts.) Three particles are at the vertices of a rigid, massless equilateral triangle, whose...

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Question

1. (25 pts.) Three particles are at the vertices of a rigid, massless equilateral triangle, whose sides are L = 4.0 m. Their

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Answer 1

Answer #1

(a)

x-coordinate of center of mass = mirtists = 104-2+30.2 -0667 mi +m3 10+20+30 = U.

m2 y-coordinate of center of mass = mitmetme = 10+20+30 = - 204273 -

(b)

Moment of inertia about the aris down the middle of the triangle = 1

I = mir + mzr = 10 * 22 + 30 * 2 = 160 kgm

(c)

Torque = la

a= Fr 20*2 = 0.25 rad/52 160

Answer 2

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