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L An object is acted upon by only the two forces F1 and F2 shown in the diagram. The magnitude of the resultant force on the object (in N) is about Fz= (E) 30 Fr :60 N (E) 5.7 s l. '',r i t- (A) 87 (B) 42 (c) s8 @" {ry' 90 sin aO ' zsN fz! , 50 cos bo'4 1'1N n , f 'Q: lbk,3 " a tr,* = 60 co5ao ' SzN e_ .'3 bOgn bD '3ot'l r- ^"f '7 N q.fi.vtl 2. A 1200-kg car is initially moving at 30 m/s when the driver steps on the brakes. If the braking force exerted by the road on the tires is constant and equalto 6000 N, how long does it take for the car to stop? (A) 3.2 r 4o* (B) s l , r*or ;l-i v"Pg\/5 c T^, @) 4.8 s q*Iao ^r Vf,O "t! t- l4r' o I -'7 +- (*4 ' rn A- bc0o l..l = fn rt- -bOOO\$ -- o- @o ' 5*lt'L V' Vo + A-C Q z 3;Or*ls+-1mls't -v(s,*ls =-s, lt'L - 36 c^-lr --:'- a L - 5 r-ls* b s '-k- 3. Which one of the following
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