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C13_presentation - The dot product is one way of...

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The dot product is one way of multiplying two vectors. Another way is the cross product, whose magnitude is defined by the relation θ sin ) ( AB B A mag = × and whose direction is given by a right-hand rule.
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Indicate whether the cross product of the two vectors points into the page, out of the page, or is zero. out zero out in
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θ 5 = A 3 = B ° = 30 if B and A of product cross the of direction and magnitude the Find θ 5 . 7 ) 30 sin( 5 3 ) sin( ) ( = ° = = × θ AB B A mag direction is out of the page
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The angular momentum of a particle of mass m about a given point 0 is defined by v m r p r L × = × = 0 r p m
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When a body moves with a constant velocity its angular momentum is necessarily zero, since angular momentum only applies to rotational motion and a body moving in a straight line does not rotate. (T) True (F) False (Z) Jeff
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(C13T.3) You are standing 30 m due east of a 50-kg person who is running at a speed of 2.0 m/s due west. What is the magnitude of that person’s angular momentum about you?
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