lec16 - L ECTURE 16: H ITTING ( SWING & TARGET ) Swing...

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L ECTURE 16: H ITTING ( SWING TARGET ) Swing maximizes Mv of “club” Strike ball in “sweet spot” minimize motion at handle minimize vibrational energy recover elastic energy Big I of club improves accuracy
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1 1 1 2 2 2 v 1 normal tangent v 1 ' v 2 ' BEFORE IMPACT AT IMPACT AFTER IMPACT 1. After the collision, the horizontal component of ~ v 0 2 is equal and opposite to the horizontal component of ~ v 0 1 because (a) the cofficient of friction is nearly zero (b) the coefficient of restitution is nearly one (c) of conservation of momentum (d) all of these (e) none of these 2. In this collision, ball #1 and ball #2 experience (a) equal and opposite forces (b) equal and opposite impulses (c) equal and opposite rotational impulses (d) all of these (e) none of these or two of these
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1 1 1 2 2 2 v 1 normal tangent v 1 ' v 2 ' BEFORE IMPACT AT IMPACT AFTER IMPACT 1. After the collision, the combined kinetic energy of the two balls is nearly the same as the initial kinetic energy of the cue ball. The reason this is true for pool ball collisions is (a) μ ' 0 ( ± ' 1 isn’t necessary) (b) ± ' 1 ( μ ' 0 isn’t necessary) (c) because μ ' 0 and ± ' 1 (d) none of these
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The collision time is short so ? is approximately conserved Brancazio
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Momentum is conserved during impact so maximize MV Brancazio
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Hay
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This note was uploaded on 12/12/2011 for the course PHYS 17 taught by Professor Mcwilliams,r during the Fall '08 term at UC Irvine.

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lec16 - L ECTURE 16: H ITTING ( SWING & TARGET ) Swing...

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