Physics
Senior High
ๆฅๅใงใ๐ฅบ๐ฅบ
ใใฎๅ้กใฎ(2)ใๆใใฆๆฌฒใใใงใใ
ใฉใใใฆ้ๅฟใฎไฝ็ฝฎใๅทฆ็ซฏใใ0.40ใซใชใใฎใใใใใใชใใงใ๐ญ
ใฉใชใใงใๅคงไธๅคซใชใฎใงๆใใฆใใใ ใใใใงใ๐โโ๏ธ๐โโ๏ธ
[็ฅ่ญ
134. ๆฃใฎใคใใใ
ใใฆ้ๆญขใใใใ ๅๅณใซ็คบใใใ็ณธใฎๅผตๅใฎๅคงใใ T1,T2, ้ทใxใๆฑใใใ
(1)
(2)
/JC(3)
T2
Tโ
60ยฐ
้ใ 60N, ้ทใ 0.80m ใฎไธๆงใชๅคชใใฎๆฃใใๆฌกใฎใใใซ็ณธใงใคใ
Tโ
0.60m
โTZ
ใฆ
Ti
20 N
ไพ้ก16
โ ,โกใใใ
h=12=30 N
(2) ๆฃใซใฏใใใๅใฏ,ๅณ2ใฎใใใซใชใใ ้็ดๆนๅใฎๅใฎ
ใคใใใใใ,
T1+T2=60 ...โข
ๆฃใฎๅทฆ็ซฏใพใใใฎๅใฎใขใผใกใณใใฎใคใใใใใ,
T2ร0.60-60 ร 0.40 = 0
ๅผโฃใใ, T2=40Nใงใใ, ๅผ โขใใ, T1 =20N
ๆฃ
ๅใฏๅณ3ใฎใใใซใชใใ้็ดๆนๅใฎๅใฎ
Act
Tโ
0.60m
ๅณ2
GA
0.40m
SACADO
Tโ
TERSY 60 NA
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