(Elasticity and Oscillations)

1
???

• ?????
• (Elasticity and Oscillations)

2
10.1 ???????

• ?????????????????,??????????????.?????????,???????
  ?,?????????.

3
10.2 ??????????

• ???(??)????????,?????????????(strain).
  ?????????????????????????.????????????(stress).
• ??????????????????????(??????????)???,??????????,
  ?????????????????,???????.
• ???????,??????????????(??????????).???????????????
  ???(proportional limit).

4
?????
(10-1)
(10-2)
????
(10-4)
5
10.1
?????
????????????? ,???????????????,????????,??????
6
??????????? ????????? ???????(?10.2)???????,???
??? ,??????? ?
7
?10.1 ?????????????
8
10.2
?????
?????0.80 kN,????(?10.3),?????????????????????????
????????????,??????? ,???????43.0 cm?
?10.3
9
???????
??
??10.1,????????
????????
???????????0.4 kN,???????
10
10.3 ??????

• ?????????????????????,?????????????,?????????.????
  ?????????,????????.??????????????,????????????????
  ?.
• ?????????????????????,???????.????????????????.
• ??????,????????????? ,??????????.

11
?10.4 ????????(a)???????(b)?????(c)????????????
,?????,????????????????????,??????????,??????????
????
12
10.3
????????
???????? (11?)???,(a)???????????(b)
?????????8.0 m,??? ?,????????(?????
????? ,????? Pa,???? )?
13
??(a) ????????????????
? ,?
???????? ? ,??
14
(b) ??????????????????????,??????????1/4 (
???????????? )???,????
????
??????????,????????
15
????

• ???????????????????????.?????????,???(??)?????????
  ???,???????????????????,????????????????.??????,??
  ?????????????????????.
• ???????,???,??????????,??????????(???)????????.

16
???? (Shear Deformation)

• ????????????????????????????.
• ??????????,????????????????????????.

17
????
(10-6)
(10-7)
18
?10.7 ????????????????????????????????????
19
????????

(10-8)
20
10.4
???
??????0.2 mm????,????????10.0 cm,???0.2
cm????,?????????????3.0 N,???????????0.5
mm,?????????? ?
???????????,?????,???????????????????????????????
???,??????????????????? -- ???????????????????????
????????
21
??????????
?????
?????????????????????????????,???????????????????

22
?10.2 ????????????????
23
????(Volume Deformation)

• ?????????????????,??????.???????????,?????????????
  ???.?????????????.

(10-9)
24
?10.10 ???????????????
25
?????????
(10-10)
26
10.5
??????????
???????? ????????????????????????????????????1
.0 km?????,??????????????????????? ?
27
??? ???,????????
??10.2,??????????? Pa,?
??
28
10.5 ????

• ???????????,???????????.?????????,????????????,???
  ????????.???????????????,?????????????.???????????
  ?????????(A).

29
?10.11 (a) ?????????,????????????,???????????(b)
??????????,???????????,?????????????
??????
?????
30
?10.12 (a) ???????(b) ???????,??????????????
31
?10.13 ????????
(10-11)
32
?10.14 ??????????????????
33
??????
(10-12)
(10-13)
(10-14)
(10-15)
(10-16)
34
10.6
???????
???????1.0 kg?????????,??????6.0 N/cm,??????18.0
cm???,????????????????????????????????????? (a)
?????????(b) ????????(c) ???????12.0
cm?,?????????????
35
??(a)????????????,??A 18.0cm?
(b) ?????,?????????????
??
(c) ????0.12 m???,?????????
??
36
???????
?
??????? ,????????????
37
10.6 ??????????

• ????????????????????(??????????,???????).?????????
  ??????,???????.
• ????????,??,?????????????(? 2p????)?????????.

38
???????? I
(10-17)
(10-18)
(10-19)
(10-20a)
(10-20b)
39
?10.16 (a) ??????????SHM???????(b)
???????????????????(c) ???????
40
???????? II
(10-21)
(10-22)
41
???????

• ??????????,?????????????.????????????????????.

42
?????? ,???????(????k ) ?????,????????????????
,????????(?10.17)
(10-23)
????????????????????????????,?????????????SHM?
43
10.7
???????
??????? ???????????? ???????????????????
(??????????,????????)??????,????????????,? (a)
??????(b) ????????????????
44
??????,???????????
(10-23)
?? ???????????,??????????????,?? ?????????
(a) ???????,?????,?????????????????
???????????(?????????)???
45
(b) ?????,???????? ,???????????
,?????
? ? ??,??????? ,???????
????? ???,????????
? ????
46
10.7 ?????????

• ????,??,??????????,????????????????90º,???????????
  90º(??,???????????180º )

47
?10.20 ????????????????
48
?????????,???????
(10-25a)
(10-25b)
(10-25c)
49
10-8
???
???????????? ( ?? ),?????????????????????????10.21
???????? (a) ??????(b) ?????? (c) ?????(d)
????????
?10.21
50
??(a)?????,??????? 0.015 m?
(b)???????????,?????, 0.04 s
(c) ????????
(d) ?? ,??? ??????
? ?
51
10.8 ?

• ??(Simple Pendulum)
• ???(Physical Pendulum)

52
??

• ????????????????????????.?????,??????????????,????
  ????.??????????????,???????.

53
??????
????
(10-26a)
???
(10-26b)
54
10.9
???
????????2.0?????????????????150 g,?????33 mm,?
(a) ????????(b) ?????????????
55
??(a) ??????????,????
?? ,
(b) ??????????????,
????????? ,?
?? ? ???0.02,???????????????
56
???

• ????????????,???????.???????????????,??????,??????
  ?????????.

57
???????
?????
(10-27)
????
(10-28a)
???
(10-28b)
??, ?????????, ??????
58
10.9 ????

• ????????????,??????,?????????????????,???????????

59
?10.24 (a)?(b)?(c)?(d) ????????? (d)
?,??????????????
60
?10.25 ???
61
10.10 ???????(Forced Oscillations and
Resonance)

• ?????????,??????????????,???????????.??????????,??
  ?????????????.
• ????????????????????,????????,?????(resonance).

62
?10.26 ?????????????????????????,???????????????1/
4?