Lecture-5 - AAE352 Lecture 5 Combined translational and rotational acceleration effects load factor and The inertia moment AAE 352 How much does a

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AAE 352 AAE352 - Lecture 5 Combined translational and rotational acceleration effects – load factor and The inertia moment

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How much does a 16 pound bowling ball weigh? What direction does the weight “act?” • It depends on the bowling ball motion • It depends on the orientation of gravity • Who is doing the weighing and where are we doing the weighing, on Earth or Mars? AAE 352
Weight is a structural load (due to ball mass) and is resisted by the structure You are a structure and can “feel” the weight • The upward structural forces in the floor (red) resist the downward applied forces (purple) • If the bowling ball is not moving the purple “forces” are just equal to mg AAE 352 g

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What if we step into an elevator and accelerate the “system” upward? We can look at the bowling ball from the viewpoint of an inertial observer – the AAE203 way • The (red) upward structural forces have to increase to supply the acceleration • The downward (purple) “forces” do not change, it are still mg • This is the AAE203 view of the world AAE 352 g a
The guy with the bowling ball is a local observer and can’t see outside the elevator. He only feels things. He will testify that he is standing still but the bowling ball now weighs

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This note was uploaded on 01/18/2012 for the course AAE 352 taught by Professor Chen during the Fall '08 term at Purdue University-West Lafayette.

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Lecture-5 - AAE352 Lecture 5 Combined translational and rotational acceleration effects load factor and The inertia moment AAE 352 How much does a

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