Homework 3
Due in class (1:00pm) on Thursday of Week 4 (Jan. 30, 2003)
Textbook Problems, Chapter 2
Conceptual Questions (p. 51): 5
Problems (p. 52): 2, 4, 19, 40, 42, 51, 65
Brief Answers
Conceptual Questions
5. Statement (a) is incorrect -- the fact that the car is going around the track means that, even if its speed was constant, its direction changes so velocity, which is a vector, changes.

Problems
2. (a) 7.1 km (b) 2.1 km at an angle of 45 degrees north of east
4. 50,000 yrs.
19. (a) 11.4 s (b) 44.7 m/s2
40. g=1.5 m/s2 pointing toward the planet
42. 1.08 s
51. 0.406 s
65. 91.5 m/s pointing down