Physics 1303,1403 - Spring 1997

Homework Assignment #1

Due:
23 January (Sections 002 and 802)
24 January (Sections 001 and 801)

READING

Chapters 1 and 3. (Note: Chapter 2 is part of the next assignment.)

QUESTIONS

Chapter 1 - 4, 9.
Chapter 3 - 3, 9, 10.

PROBLEMS

Chapter 1 - 11, 15, 16, 29, 41, 52.
Chapter 3 - 4, 13, 22, 41, 46, 47.

ANSWERS

Q 1-4) (b) A/B and (d) AB are physically meningful.
Q 1-9) Yes. The density of water is convenient.
Q 3-3) 3 < |R| < 7
Q 3-9) No.
Q 3-10) No.
P 1-11) m=1=n
P 1-15) [A]=L3 T-3 ; [B]=L3 T
P 1-16) V = (0.579 ft3/s) t + (1.19 x 10-9 ft3/s2 ) t2
P 1-29)
  1. 1 mi/h = 1.609 km/h
  2. 88.5 km/h
  3. +16.1 km/h
P 1-41) about one million (106 )
P 1-52)
  1. 797 (no decimal places)
  2. 11 (two sig figs)
  3. 18 (two sig figs)
P 3-4)
  1. (2.17, 1.25) m and (-1.90, 3.29) m
  2. 4.55 m
P 3-13)
  1. 10 m
  2. 15.7 m
  3. 0 m
P 3-22) (358 m East, 12.5 m South) = 358.2 m at 2 degrees S of E
P 3-41)
  1. C = (5i - j - 3k) m, |C|=5.92 m
  2. D = (4i - 11j + 15k) m, |D|=19.0 m (This answer has been corrected.)
P 3-46) a=5; b=7
P 3-47)
  1. (49.5, 27.1) units
  2. 56.4 units, 28.7 degrees

Please report any corrections to Professor Scalise.

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