A) 3 m/s B) -3 m/s C) 12 m/s D) -12 m/s E) Need additional information. Ans: B Difficulty: Easy Section 2-1 Learning objective 2.1.6 15. The coordinate of a particle in meters is by = 16t 3.0t3, where the time is in x(t) t – seconds. The particle is momentarily at rest at = t A) 0.75 s B) 1.3 s C) 1.8 s D) 5.3 s E) 7.3 s Ans: B Difficulty: Medium Section: 2-2 Learning Objective 2.2.1 16. Each of four particles moves along an axis. Their coordinates (in meters) as functions of x time (in seconds) are given by particle 1: = 3.5 2.7t3 x(t) – particle 2: = 3.5 + 2.7t3 x(t) particle 3: = 3.5 + 2.7t2 x(t) particle 4: = 3.5 3.4t 2.7t2 x(t) – – For which of these particles is the velocity increasing for 0? t> A) All four B) Only 1 C) Only 2 and 3 D) Only 2, 3, and 4 E) None of them Ans: C Difficulty: Medium Section: 2-2 Learning Objective 2.2.1
A) 3 m/s B) -3 m/s C) 12 m/s D) -12 m/s E) Need additional information. Ans: B Difficulty: Easy Section 2-1 Learning objective 2.1.6 15. The coordinate of a particle in meters is by x(t) = 16t – 3.0t3, where the time t is in seconds. The particle is momentarily at rest at t = A) 0.75 s B) 1.3 s C) 1.8 s D) 5.3 s E) 7.3 s Ans: B Difficulty: Medium Section: 2-2 Learning Objective 2.2.1 16. Each of four particles moves along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by particle 1: x(t) = 3.5 – 2.7t3 particle 2: x(t) = 3.5 + 2.7t3 particle 3: x(t) = 3.5 + 2.7t2 particle 4: x(t) = 3.5 – 3.4t – 2.7t2 For which of these particles is the velocity increasing for t> 0? A) All four B) Only 1 C) Only 2 and 3 D) Only 2, 3, and 4 E) None of them Ans: C Difficulty: Medium Section: 2-2 Learning Objective 2.2.1
Test-Bank-for-Fundamentals-of-Physics-Extended-10th-Edition-by-Halliday.docx