# 2 the rst equa6on can be wrien as m1 v1i v1

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Unformatted text preview: collisions. Perfectly inelas6c collision Find the common velocity of the two bodies in the diagram, if they s;ck together aWer the collision (completely inelas;c collision). What is the common velocity if the target (body 2) is at rest ini;ally? (chalk board stuﬀ) Answers: v f = m1v1i + m2 v2 i m1 + m2 m1 vf = v1i m1 + m2 Note: proper sign must be used when we plug in the the given values of v1 and v2. In a perfectly inelas6c collision, the two bodies s6ck together and move with a common velocity as in this example Elas6c collisions Recall that, kine6c energy is conserved as well in elas6c collisions. Take the situa6on as described in the ﬁgure below. Note that we are dealing with 1D collisions. Conserva6on of linear momentum: m1v1i + m2 v2 i = m1v1 f + m2 v2 f ...........(1) Conserva6on of kine6c energy (elas6c collision): 1 1 1 1 2 2 m1v12i + m2 v2 i = m1v12f + m2 v2 f 2 2 2...
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## This note was uploaded on 11/16/2010 for the course PHY 2170 taught by Professor Blank during the Spring '08 term at Wayne State University.

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