summary4 - or, the mutual action of two bodies upon each...

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Lecture 4 - summary The Three Laws of Motion of Isaac Newton (1642 – 1727): 1. Every body continues in its state of rest, or of uniform These laws can be used to solve real motion in a right line, unless it is compelled to change that engineering problems state by forces impressed upon it. Example: Fall of the WTC towers 0 V 80 = M 96 = 110 = N 2. The change of motion is proportional to the motive force on 9/11 2001 impresses, and is made in the direction of the right line in which that force is impressed. 3. To every action there is always opposed an equal reaction: Photograph of towers removed
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Unformatted text preview: or, the mutual action of two bodies upon each other are always equal, and directed to contrary parts. due to copyright restrictions. pp. 37-48 in manuscript Test 2 hypotheses: 1) Free fall 2) Kausel’s model – discrete mass formulation Instantaneous Conservation of linear momentum under h 0 , V m ? 1 1 = V + = m m m ? 2 2 2 = + = V m m m changing mass δ p i = 0 ⇒ V i = m i − 1 V i − 1 V i − V i − 1 m i Δ t i = g Discrete Free fall mass model Measurement North Tower: 10.9 s ≈ 10 s South Tower: 8.9 s...
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This note was uploaded on 11/29/2011 for the course CIVIL 1.018j taught by Professor Markusbuehler during the Fall '08 term at MIT.

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