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13 March, 05:53

F an object has a moment of inertia 28 kg·m2 and rotates with an angular speed of 106 radians/s, what is its rotational kinetic energy

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  1. 13 March, 06:11
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    I'm assuming by angular speed you mean angular velocity. So the formula for rotational kinetic energy is 0.5*I*w, so 0.5*28 * (106^2) = 157304. It's really high but I guess that makes sense because of how high the angular velocity is.
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