Hr_Ex_2_PHYS_180_S2010_sol[1] - PHYS,Oo 3 1BO HourExam#2...

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PHYS 1BO ,O o 3 Hour Exam #2 Spring 2010 f ot-vn vN Narne No notes. Closed book. You may only use official $5 calculators. For problems marked OSE, you must start with an Official Starting Equation to get fult credit. Box your answers (1) t5 pointsl Do you have trouble paying attention? (A) yes (B)no (C) Huh? What were you saying? (2) [15 points] ff an object is in equilibrium, (A) it must have zero velocitv t---l (B) it must be at the origin (C) it must have zero acceleration (D) ail of th6 | c I above, (E) none of the above (3) t15 pointsl Which of the following factor(s) determine(s) themaximum value of static friction? (Answer A, B, C, D, E, or F) (f) the area of contact (ll) nature of the surfaces (lll) the normaf forces (A) l, ll and lll (B) land ll (C) land lll (D) Il only (E) ll and lfl (F) llf only (4') [1 5 points] A 10,000 kg truck collides head-on with a 1,000 kg light car. what statement is true? (A) The force exerted by the truck on the car is 10 times as large as the force exerted by the caron the truck. (B) The force exerted by the truck on the car is larger than the force exerted by the car on thetruck, butnot necessarily 10 times as large.
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