Physics 101 - Suggested Extra Problems     Fall '99

The more problems you solve, the better prepared you will be for the tests...

Various people have asked for a list of suggested problems, aside from the homework, that would be particularly good to attempt. I have selected some good extra problems from Fishbane et al. (either odd-numbered ones, so you can check the answer in the back of the book, or else I'll put the numerical answer here), but I'd also suggest that you could look at one or more of the alternate textbooks for additional problems and worked examples. I'll try and update this list as the term progresses...  

Chapter 1:
1-12
1-23
1-51
1-56    (Answer: v = k(B/
)1/2, where k is an unknown constant).
Chapter 2:
2-15
2-26    (Answer: a = 10.5 m/s2)
2-37
2-42    (Answer: no; 107 ft)
2-49
2-55
Chapter 3:
3-13    (Note: the answer in the back of the book has a typo in it; should be 2.4 m/s3, not 2.4 m/s2)
3-23
3-25
3-28    (Answer: a) at foot of mast   b) 1.3 s   c) 4.4 m horizontal and 8.5 m vertical)
3-46    (Answer: a) 15 m/s2;   8.2 m/s)
3-64    (Answer: 27 m/s)
Chapter 4:
4-18    (Answer: 105 m/s; 106 m/s; 108 m/s)
4-22    (Answer: (-0.5i - 0.7j -5.1k)N; 5.17 N)
4-24    (Answer: a) 0.89 m/s2; b) 8.0 N to the right, 6.2 N to the left, Fnet = 1.8 N to the right; c) 6.2 N to the right, 3.5 N to the left, Fnet = 2.7 N to the right; d) 3.6 N to the right is the only force)
4-31
4-59
Chapter 5:
5-2    (Answer: 27 lb)
5-5    (any problem involving hockey has got to be good... )
5-6    (Answer: amin = 1.56 m/s2; b) 12.5 m, 6.24 m/s down)
5-14    (Answer: 32°)
5-20    (Answer: 0.135)
5-32    (Answer: 5.9 N; 8.8 N)
5-34    (Answer: 9.4 m/s; 4.7 m)
5-46    (Answer: 4.47 m/s)
5-74    (Answer: 9.3 m/s - I've seen this crazy stunt done...)
Chapter 6:
6-20    (Answer: 1.0 J)
6-34    (Answer: Wf = -4.3 x 102J,   µk = 0.20)
6-44    (Answer: 0.98 J in both cases)
6-77    (note: there is a typo in the answer in the back of the book; in part b) it should be 10+7 not 10-7 )
Chapter 7:
7-6    (Answer: Farcher = 2bx + 3cx2; Fstring = -2bx - 3cx2)
7-17    (this is actually a very realistic potential)
7-23    (hint: a sketch might help...)
7-35
7-36    (Answer: a) vB = (2gH)1/2; b) vC = (2g(H-2R))1/2; c) N = mg(2H/R - 5); d) 5R/2)
7-56    (Answer: a) vb = 1.4 m/s; vc = 0.63 m/s; never reaches point d; b) ymax = ya = 10 cm)
Chapter 8:
8-28    (Answer: a) vNp = 2.8 x 105 m/s; b) KHe = 9.6 x 10-13J; KNp = = 1.6 x 10-14J)
8-32    (Answer: a) v3 = -1.2 m/s; v4 = +2.7 m/s; b) 0.76 J)
8-34    (Answer: a) 4.0 m/s   b) 8.0 m/s in direction of bullet's original motion)
8-74    (Answer: 2.2 m)
Chapter 9:
9-8    (Answer: a) 3.49 rad/s down; b) -0.7285 rad/s2 up)
9-20    (Answer: 7.02 x 102 J; 1.40 x 103 J)
9-65
Chapter 10:
10-17
10-30    (Answer: 2.89 rev/s)
10-49
Chapter 11:
11-9
11-39
Chapter 12:
12-19
12-26    (Answer: 3.38 x 109 J)
12-56    (Answer: a) 2.67 x 1012 m/s2 ; b) 5.34 x 103 N - these tidal forces are big)
Chapter 13:
13-13
13-33
13-67
13-75
Chapter 14:
14-3
14-8
   (Answer: a) 24 Hz; b) 8.0 Hz)
14-43
14-65
Chapter 15:
15-16
   (Answer: 262 Hz or 266 Hz)
15-26
   (Answer: 2.0 m)
15-27
15-51
Chapter 16:
16-18
   (Answer: 27 m)
16-31
16-37
   (hint - you can use projectile motion for part of this question)
Physics 101
College of William and Mary
Dept. of Physics

armd@physics.wm.edu
last updated: Dec. 1 1999