Problem: The three 190 g masses in the figure (Figure 1) are connected by massless, rigid rods.(a) What is the triangle's moment of inertia about the axis through the center? Express your answer to two significant figures and include the appropriate units.(b) What is the triangle's kinetic energy if it rotates about the axis at 4.4 rev/s? Express your answer to two significant figures and include the appropriate units.

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FREE Expert Solution

Moment of inertia:

I=mr2

I = mr2

Kinetic energy:

K.E=12Iω2

(a)

I = mr2 + mr2 + mr= 3mr2

r is the distance from the center to the vertex.

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Problem Details

The three 190 g masses in the figure (Figure 1) are connected by massless, rigid rods.

(a) What is the triangle's moment of inertia about the axis through the center? Express your answer to two significant figures and include the appropriate units.
(b) What is the triangle's kinetic energy if it rotates about the axis at 4.4 rev/s? Express your answer to two significant figures and include the appropriate units.

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Our tutors have indicated that to solve this problem you will need to apply the Moment of Inertia & Mass Distribution concept. You can view video lessons to learn Moment of Inertia & Mass Distribution. Or if you need more Moment of Inertia & Mass Distribution practice, you can also practice Moment of Inertia & Mass Distribution practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Roser's class at WWU.