Chapter 7

Homework Answers

 

Multiple Choice Answers

3. b
7. d
8. b
10. e
13. c

Problem Answers

2. 60 m/s
3. 37 m
10. a. -8 m/s
b. 1 s
13. From 4.0 s to 5.0 s
16. a. Impulse or change in momentum
b. force is negative
c. 0 kgm/s
d. 10 m/s
21. -6kN
24. -890 kgm/s
-8.9 kN
26.
29. 10.2 kgm/s at
30. 2.4 km/s
34. a. 6.0 kgm/s west
b. 6.0 kgm/s east
c. 24 m/s east
38. -9.6 cm/s
43. -220 N
45. -0.0202 m/s
47. 18 m/s
52. 0 m/s
54. a. 18 kgm/s
b. 0 kgm/s
c. 0 kgm/s
d. -18 kgm/s
e. -6.0 m/s
f. No
57. 460 m/s
63. 7.0 cm/s
0.13 J
67. exchange velocities
69.