test0412

test0412 - Page 2 6. The horizontal and vertical components...

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Unformatted text preview: Page 2 6. The horizontal and vertical components of the initial velocity of a football are 24 m/s and 7 m/s respectively. What is the initial velocity of the football? ,J a. 31 m/s Voy ""'",2.A1'l j I ", (V @25m/s c. 17m/ s d. 42 m/s 7. J Vo .: ~I('). 7I = p ..=:: 21.1 f 7 I -t'-4./" /"}) "l- -z. - Assuming that it takes 0.20 s for the driver to react before applying the brakes, what is the stopping distance (the distance from the point where the driver first sees the need to stop to the point where the car comes to a stop) for a car traveling at 35 m/s if the deceleration due to the brakes is 3.5 m/s2? =:°1 0, 10 ~ 1/ A( I/o a. 93 m =: 5 ;-(0.7..)':: 7. (J f1'\-2. ..~ b. 87 m l", <J , V, I~ "l. 2 ~ )(1 -:><-, .:: -.......... L----"~~~ t. (C) 182 m +2C{ (X; ~2.. _ -t.o -t, t<. 175 m i,~ -Co \/ _ V 1. cr. V~.:: V, V 8. =:0; -XJ __ V,.:do , ,- A person walks 8.0 m In a stralght east and a certain distance north. @e36oerson r;!~t.f walked? r< =: <;l,on! e- '2 b. 45° c.600 1)(':: /) _ S (7"- X-t..o+..l=17:;+7 ,,, _! £./. 0,., _,(X).::; p.. C d.900 9. £F-3?j ~ 17r,.., llne east of north and ends up 4.0 m How many degrees east of north has jrl 4) 1/- (g S'oftJ A vector is located in the x-y plane. The x and y components of this vector are 4.0 m and 3.0 m. Find the angle that this vector makes with .J=feposoitive y-axis. ~ 53.\ b.36.9 ..c.126.9° R) d.22.4° 7 &= -= I !<Y) b.-l~ P7 L = '0Cf/'l -'/1;.) ('? J t) 5'],/ f? Y ----10. A player throws a football 7~m at 61° north of west. The westward component of the displacement of the football thrown is given by: a. 64.7 m @35.9 m c.74.0m 7 'l.( d. 0 m ~ V ~ (y b{' , I ;x- .l I 5 ;:;:- =: 30 =-- ...
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This note was uploaded on 12/10/2011 for the course PHY 1111 taught by Professor Stencil during the Fall '11 term at UGA.

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