c tc gt gˆˆˆ(12.5 m/s) i ( 5.6 m/s) i(18.1 m/s) ivvv=−=−−=GGGrelative to the truck. Since the velocity of the cheetah relative to the truck at the beginning of the 2.0 s interval is ˆ( 8.3 m/s)i−, the (average) acceleration vector relative to the cameraman (in the truck) is 2avgˆˆ(18.1m/s)i ( 8.3 m/s)iˆ(13 m/s )i,2.0 sa−−==Gor2avg||13m/s.a=G(b) The direction of avgaGisˆ+i , or eastward. (c) The velocity of the cheetah at the start of the 2.0 s interval is (from Eq. 4-44) 0cg0ct0tgˆ( 8.3 m/s)i( 5.6 m/s)i( 13.9 m/s)ivvv=+=−+−GGGrelative to the ground. The (average) acceleration vector relative to the crew member (on
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.