่ณชๅใใใฆใใๆ้ใใใกใพใใใใๆใใพใใใใ(ๆใใใฎใฏๆๆฅใซใชใใพใ)๏ผ
๏ผๆ็ฎ
้็ดไธๅใใงใใ
Physics
Senior High
็ฉ็ใงใ๐โโ๏ธ
ใ1ๆ็ฎใ
11ใฎๆฐ็ใใใฎ่ฝไธใงโดใฎ็ญใใใ้็ดไธๅใใใซ14m/sใชใฎใงใใใใชใใง้็ดไธๅใใชใใงใใใใ๏ผ
ใ2ๆ็ฎใ
17ใฎโตใใใๅใใใพใใโฆ
ใ3ๆ็ฎใ
23ใฎโถใง็ญใใ0.45mใชใใงใใใชใใง0.450ใใใชใใใงใใใใโฆ๏ผๅ้กๆใฏ0.300ใงๆๅนๆฐๅญ3ๆกใ ใจๆใฃใใใงใใโฆ
11.ๆฐ็ใใใฎ่ฝไธ)
้็ดไธๅใใซไธๅฎใฎ้ใ 14m/s ใงไธๆใใๆฐ็ใใ, ๅฐ็ใ้ใใซใฏใชใใจ, 10s ๅพ 14m/s,
ใซๅฐ้ขใซ้ใใใ้ๅๅ ้ๅบฆใฎๅคงใใใ9.8m/s? ใจใใใ
(1) ๅฐ้ขใง้ๆญขใใฆใใไบบใใ่ฆใใจ,ใฏใชใใ็ดๅพใฎๅฐ็ใฎ้ๅบฆใฏ,ใฉใกใๅใใซ
ไฝ m/s ใใ
(2) ๅฐ็ใใฏใชใใ้ซใใฏ, ๅฐ้ขใใไฝmใใ
NOD
NO)
NO9
NOT
6.0-4.062.08
ๆฌกใซ็คบใใใๅใฎๅๅใฎๅคงใใใฏไฝN ใใ
17. ใซใฎๅๆ
23.ๅผพๆงๅใจๅ็ดๆๅ
ๅณใฎใใใซ,ๆฐดๅนณ้ขไธใซ็ฝฎใใใ่ณช้ 3.0kg ใฎ็ฉไฝใซ่ปฝใใฐใญใใคใใฆ, ้็ดไธๅใใซๅผ
ใใใฐใญใฎ่ช็ถใฎ้ทใใ 0.300m, ใฐใญๅฎๆฐใ 196N/m, ้ๅๅ ้ๅบฆใฎๅคงใใใ 9.8m/s? ใจ
ใใใ
9.830kg
(1) ใฐใญใฎ้ทใใ0.350mใซใชใฃใใจใ,็ฉไฝใใฐใญใใๅใใๅผพๆงๅใฎๅคงใใใฏไฝNใใ
(2)(1)ใฎใจใ,็ฉไฝใ้ขใใๅใใๅ็ดๆๅใฎๅคงใใใฏไฝNใใ
(3) ใฐใญใใใใซ้็ดไธๅใใซใใฃใใใจๅผใใฆใใใจ, ใใใฆ็ฉไฝใ้ขใใใฏใชใใใ้ขใใใฏใชใ
29.4N
ใ็ฌ้ใฎใฐใญใฎ้ทใใฏไฝmใใ
() W=mgใใใ
็ฉไฝใๅบใใใฏใชใใ
9.8ร3.0= 29.4N
@ ไบ็ด็ฉๅใ0ใ
F=ใxใใใ
196x (0.35-0.30]=/9.8Nใ
(2) 9.8+ N-29.4=0
ใใงt0-29.4=0
kx= 29.4
N=19.6 =A0Wใ
1962=29.4
L-0.15
18
0.300 + 0.150
19
20.ใ50m
S0000
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions ๐
