lecture03

# lecture03 - P5 Free-Fall Acceleration ) / 32 ( / 8 . 9 2 2...

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Physics 131 Spring 2008 Dongping Zhong Lecture 3 (Friday, March 28) Complex Kinematics Key concept: Free-Fall Acceleration (g=9.8m/s 2 ) Page 1

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P2 Motion with constant acceleration: . 2 2 const dt x d dt v d a = = = v v v 2 0 2 0 0 0 2 0 0 0 2 2 0 2 0 0 ) ( 2 : 2 2 0 ) ( ) ( 2 ) ( v v x x a a v v t Note t a v t t a t v t x x v a a t d x d dt dV t a a at v dt dx t v v t a t v x t x x avg = = + = + = = = = = = = + = = = + + = =
P3 Ex: x = x(t) = A + Bt + (C/2)t 2 A,B,C are constants, independent of t Find: x 0 , v avg , v, a avg , a

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P4 Ex: At t 0 =0, V 0 =0, x 0 =+5 m, a(t)=a 0 =-2.5 m/s 2 Find out : v(t) t and v at x=0

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Unformatted text preview: P5 Free-Fall Acceleration ) / 32 ( / 8 . 9 2 2 s ft s m g g a = = P6 Ex: Suppose at t=0, x=x =0 V=V =+20 m/s, a=-g=-9.8 m/s 2 Find out: (a) how long does it take with V=0? (b) how far has it gone when V=0? (c) how much longer with x=0 again? (d) what is the velocity when x=0 again?...
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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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lecture03 - P5 Free-Fall Acceleration ) / 32 ( / 8 . 9 2 2...

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