Answer: The total rotational kinetic energy of the five blades is 10.9J
Explanation: Please see the attachments below
The moment of inertia for the 5 blades of fan is [tex]\bold {0.246\ kg.m^2 }[/tex]
From the fomula of moment of inertia,
[tex]\bold {I = \dfrac 13 ML^2}[/tex]
So, total moment of innertia of 5 blades,
[tex]\bold {I_t= \dfrac 53 ML^2}[/tex]
Where,
M - mass = 0.34 kg
L - length = 0.66 m
put the values in the formula,
[tex]\bold {I_t= \dfrac 53 \times 0.34\times 0.66^2}\\\\\\bold {I_t=0.246\ kg.m^2 }[/tex]
Therefore, the moment of inertia for the 5 blades of fan is [tex]\bold {0.246\ kg.m^2 }[/tex]
To know more about moment of inertia,
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