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8๏ธโฃ(3)็ญใ 0.1cm
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8. ๅณใฎใใใซใไบบใ20Nใฎๅใงๅฐ่ปใๆผใใฆใใใ ๆฌกใฎๅใใซ็ญใใชใใใ
(1) ๅณใฎP็นใฏใๆใจๅฐ่ปใๆฅใใ็นใงใใใใใฎ็นใฎใใจใไฝใจใใใพใใใ
(2) ็ขๅฐใฏใไบบใๅฐ่ปใๆผใๅใ่กจใใฆใใใ็ขๅฐใฎๅใใฏไฝใ่กจใใพใใใ
(3) ๅณใฎ็ขๅฐใฎ้ทใใ 2cm ใงใใใจใใใจใ1N ใฎๅใฏไฝ cm ใฎ็ขๅฐใง
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