samptest3-s06-key - " Sample 7‘4; 4- Physics 10]...

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Unformatted text preview: " Sample 7‘4; 4- Physics 10] Test, #3 Answer all problems. Clearly illustrate the basic principles and show all steps. Name (capital letters) -----»-»--»——43<%=-\------—-------------um»- 2 m». 4-... 5-»- am. 7 sm- Extra Credit --- Total m»- ‘1... a. (5 pts) What is the angular acceleration of a bug on a rim of 0. 12 m radius record if the record moves from rest to a 78 rpm in 3.0 s? b. (Spts) How many revolutions it covers in that 3.0 s? c. (5 pts) When the record is at its final speed of 78 rpm, calculate the tangential (translational) speed of the bug and the radial acceleration? d. (3 pts) What is the tangential acceleration during the 3.0 5 period? ' M/.r — m 0.19:0 w».— 7% WW7? g; 2.847 “4/, V (A) 15’ zfi-(zxzh) ‘6: 7V 5 C5 :O\,L(%-fl\'1a‘?x M/S , 0'18 1 r" ‘1'): " "'11: I g'°\ Ml}- ’48 pts) a) What is the total pressure on the back of a scuba diver in a lake at a depth of 8 m? b)'What is the force on the diver's back taking the surface of the back to be a rectangle 20 cm by 20 cm? -? = + fjk 0‘ ° ' 4‘: I80 w \ =3 [off-((M0) $8 (3') ’0 (P )9) E— / I. ‘F: /¢?0/m(0.2 x01) .= mam -l~~ 80/673" 4__,,... , 3. (11 pts) Calcutate the net lorq-uetmagnituda and direction) on the beam in the figure about a) an axis through 0, perpendicular to the page, and b) an axis through C, perpendicular to the page. 95N r) Z’YO : ‘3 cacao.) .— Io 3.in('m)(_L/) 9 2. 7 ° Nrm Courflh-c'odlw'lf‘Q 0 TIMI}: 73* ',.. c v b) 1: 30 SM‘IS' "' )0 Sr'nio(2’ b .‘J ION c SON 4m -.-. #7. In -— 6- 9” . = 6’ m qu’wflaalmkwv’fi'i. 6 ‘ ( if m3 A liquid of density 1.65 g/cm3 tlows smoothly through two horizontal sections at tubing joined and to end. In the first section the cross-sectional area is 10 cm?, the flow velocity is 275 cm/s and the pressure is 1.2 x 105 Pa. The liquid then enters the second section where the cross-sectional area is 2.5 cm. (a) Calculate the flow velocity in the second section. A ’V‘ -: - 2/" /0 (17§)>’2'§ U1 ’% V1: 2.; J (b) Calculate the pressure in the second section. ( _ Q .7 in ,. a 'V‘ «t 42 +M—1%+230L Ad? . 4 P e _ l~ZX|0§+_:(loo/§xi9)(27‘5 7"? +L ([065 Xlij<2£o) “)3 /&" _ 1 7' A)? 2:? :3» (P / “L /§:0er 6(fifpm) frictionless surface. alOng the x-'axis ‘ Caiculate the speed of the 0.1 kg puck an collision. See figure. b) prove if this collision is elastic or inelastic. \ A 0.1 kg puck, iniiially at rest on a hori is struck by a ' 0*) O'qha’ mlkg . .7: o -----\—-73—3.————x e OTC..C¢\\:g;m " 0 V ,, 7 \A «A 52 __,, ____) A \‘l A M+¢r Lall.‘g,'m M'W¢'*V"1"zc'= “4va + Wz\{+ X*€un-1’ (o-H)(S) 7" 0 " O +D"‘V1‘?%3° 2. : -—--—— z-Q o M 3 =3 v27C M so 3\ /: I __ a"! v __D.1V‘F3«'n30 O '+ 0 - 1+ ’- I . a = 0.4 m —0'l(72'I)—7: r,\/ ‘= 0-i(z§-\) 2 I - z . v1 ( V‘L L Ma 16 ---—’ TM: 1—} ’Ti‘mzvzffi ‘9) 7’"! V“. ‘1' E ’L %(o.q)(s>‘+ ,{u-Mo)‘ i 7‘<o:w)(2o7)1+z‘(OMB-x) '- th4I*4'¢ (-Io V‘s» 7' You are the design engineer m charge of the crashworthi- ness of new automobile models. Cars are tested by smashing them into fixed. massive barrters at 50km/h (30 mph). A new model of mass 1500 kg takes 0.155 from the time of impact until it is brought to rest. (0) Calculate the average force exerted on the car by the barrier. [W (b) Calculate the average deceleration of the car. x v ‘ " > o 8. a ( 8 P‘s) Atmospheric pmwrt. at the surface of—the can!) is about LOX 105 Pa; What force. in M mom. does this aunospheriqpmsun produce. on yomreatdrumrwhich has an area of "‘abomhlo‘sm’? WW -\ m lulu- in 167, (1%? S‘ .N) %. clfpts) Water flows at a speed of 0.5 m/s through a hose with a radius of 0.02 m. The hose is horizontal. a) At what speed does the water pass through a nozzle that has an effective radius of 0.003 m? b) What must be the absolute pressure of the water entering the hose if the pressure at the nozzle is atmospheric pressure? c) What is the flow rate in m’ls at the hose and at the nozzle. at) A 7». = flflfl ._ 2. ’- l( (0434) 0,3' —; Tl—(o-Oog) 1r}, V ,- _Z ,_ EVIi—rflfil‘rf .<"l’z4%0°7€1*3%‘3/L rF‘ +% (10“) (mg): "-7 IX\§+§':CIQO°)( ‘) ‘T1 2. C) Fla-w M Ar: emsi N‘ 4W1 64"?“ I. ‘L .. II (0.01) 0.5 = _’ W), . ~ :What is the magnitude of the an fiular l ' I l I . hand of a clock? V 8 n “my °f “"3 5°00“ .zM. w 7t -E'IM "zo /‘ ...
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This note was uploaded on 10/13/2010 for the course PHYSICS 101 taught by Professor Abdulrazzaq during the Spring '10 term at West Virginia State University.

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samptest3-s06-key - &amp;quot; Sample 7‘4; 4- Physics 10]...

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