Exam+1+--+Winter+2000+--+ANSWERS+_do+not+distribute_

Exam+1+--+Winter+2000+--+ANSWERS+_do+not+distribute_ - tj....

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t" il v tj. ! )ir i ,/{n l fx " y'?-( t tN0[ l: Given the two vectors shown determine the magnitude of the vector A - B. Vector A has a magnitude of 3.0 m and vector B has a magnitude of 5.0 m. Vector A makes an angle of 60o with the x axis. Vector B makes of l5o with the x axis. a) 8.4 m @ r.o' c) 4.6 m d) 2.5 m e) 9.8 m 2,6q X^ l,Q- 4,$ = -3,3 r/ z 2,6s4-1.24 = l,V I 2: An airplane can travel through still air at 540 km/hr. The plane needs to travel from airport A to airport B. Airport B.is 1250 km due East of airport A. If the plane must fly through a wind which blows at 200 km/hr from straight south, how long does flight take? {wi"o' 2oo km/hr a) 2.31hr b) 1.94 hr c) 2.62hr z.so t* e) 3.21hr B @ A o L= rt, eqw1ol ,brb \7 7 EO\,(o
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3: Three masses are arranged as shown in the picture. The pulleys and ropes are massless and the coefficients of friction between block 2 and the table are p,=0.65 and p1=0.42. What is tension T2? 12.4 N 19.8 N 32.6 N 42.7 N 23.5 N Fn+i [t,'f q a) b) ,'C) A v 30 ,bv tt- f-\ J I 4: When an astronaut throws a ball on the Earth the maximum distance she can get it to travel g3 m (ignoring the effects of air friction). If the same astronaut the ball on Mais, how far will it travel. It may be useful to know that radius of Mars is 3395 km, the mass is 6.4x 1023 kg, and between Mars the Sun is 2.28x10t km. 1t\,L = )t D,1L q ,Bqg -,5 I' lr \L. / - b1,68 -) f _it ,r i I : "- r a) 326m 9llln , d)' 83m e) 4lm F q\'A,{-' (/ lalIl$ll ['83 vn &'TL ;3-UtSttl7& /q f, x=Vi q,rrD lg 4-- b blrlur | (,,+xr*, d /6^qyepi^ ). 1= b,1
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5: The force F pushes two blocks across a surface at a constant velocity of 0.54 m/s as shown in the picture. The block masses or fl1 = 5.3 kg and m2 2.5 kg. If the coefficient oi friction between the blocks and the surface it lr* 0.35, what
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Exam+1+--+Winter+2000+--+ANSWERS+_do+not+distribute_ - tj....

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