Question

The three 250 g masses in the figure (Figure 1) are connected by massless, rigid rods. Figure 40 cm 40 cm 40 cm 60° 60° Axis Part 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. I = 4.0 × 10⁻² kg·m² Correct Part B What is the triangle's kinetic energy if it rotates about the axis at 5.0 rev/s? Express your answer to two significant figures and include the appropriate units. Krot = 0.7536 J Incorrect; Try Again; 4 attempts remaining

          The three 250 g masses in the figure (Figure 1) are connected by massless, rigid rods.
Figure
40 cm
40 cm
40 cm
60&#176;
60&#176;
Axis
Part 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.
I = 4.0 &#215; 10&#8315;&#178; kg&#183;m&#178;
Correct
Part B
What is the triangle's kinetic energy if it rotates about the axis at 5.0 rev/s?
Express your answer to two significant figures and include the appropriate units.
Krot = 0.7536 J
Incorrect; Try Again; 4 attempts remaining

The three 250 g masses in the figure (Figure 1) are connected by massless, rigid rods.
Figure
40 cm
40 cm
40 cm
60 #176;
60 #176;
Axis
Part 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.
I = 4.0 #215; 10 #8315; #178; kg #183;m #178;
Correct
Part B
What is the triangle's kinetic energy if it rotates about the axis at 5.0 rev/s?
Express your answer to two significant figures and include the appropriate units.
Krot = 0.7536 J
Incorrect; Try Again; 4 attempts remaining

Added by Remedios W.

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