lecture04

# lecture04 - (3) West for 50 min (C=50 km) Where is the...

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Physics 131 Spring 2008 Dongping Zhong Lecture 4 (Monday, Mar. 31) Vectors Key concept: Scalar and Vector Vector (direction and magnitude) Page 1

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P2 z X y A y A z A x A ` ) ( 2 2 2 z y x A A A A A + + = = v k A j A i A A z y x v v v v + + = ) ( i v A a aA A a k aA j aA i aA A a z y x v v v v v v = = + + = ) ( j v ) ( k v k B A j B A i B A B A z z y y x x v v v v v ) ( ) ( ) ( + + + + + = +
P3 A B B A v v v v + = + (commutative) C B A C B A C B A v v v v v v v v v + + = + + = + + ) ( ) ( (associative)

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P4 Which figure shows
P5 Which figure shows (1) (2) (3) (4) (5)

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P6 In 2-Dimension y x A θ A v x y y x A A A A A A = = = θ tan sin cos A x A y
P7 Ex: A train moves at 60 km/hr (=1 km/min) (1) East for 40 min (A=40 km) (2) 50 0 East of North for 20 min (B=20 km)

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Unformatted text preview: (3) West for 50 min (C=50 km) Where is the train? P8 The Scalar (dot) Product: a b b a ab b a v v v v v v = = cos The Vector (cross) Product: a x b b x a ab c magnitude c vector another b x a v v v v v v v = = sin a v b v b x a c v v v =...
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## This note was uploaded on 04/18/2008 for the course PHYS 131 taught by Professor Reay during the Spring '08 term at Ohio State.

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lecture04 - (3) West for 50 min (C=50 km) Where is the...

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