tag:blogger.com,1999:blog-57178788442003483692024-02-21T17:40:49.070+07:00Fisika :: a Piece of CakeBlog XI IPA 3 Kelompok 7 SMA Santa Maria Surabayablog fisika XIIPA3http://www.blogger.com/profile/09125685412187693269noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5717878844200348369.post-1075378540151416812011-02-12T22:41:00.000+07:002011-02-12T22:41:57.604+07:00<div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"></div><div style="color: yellow; text-align: center;"><span style="font-size: x-large;">Karya Tulis Ilmiah </span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"><span style="font-size: small;"><span lang="en-US">Yang dimaksud dengan kesetimbangan adalah keadaan system atau benda yang pengaruh dan gaya torsi nol. Sedangkan benda tegar sendiri berarti ukuran dan bentuk benda tidak berubah karena pengaruh gaya dan torsi. Pada benda setimbang berlaku ∑F</span><sub><span lang="en-US">x </span></sub><span lang="en-US">dan ∑</span><sub><span lang="en-US">y </span></sub><span lang="en-US">= 0, serta </span><span lang="en-US">∑τ = 0.</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"><br />
</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUKJohDLt4JHpPCTz0IGeIn6JD6DpHq_h2qUCO-AEF3MCLiXT_3djW_SjsAroEcyA3G6dPa2aL-0E9po_bcuJJDO0fNUqf5O3JpB-yQXCBYzTiSOnSd_Bd37XBYRRxiDesTwf0DpetR0U/s1600/New+Image.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUKJohDLt4JHpPCTz0IGeIn6JD6DpHq_h2qUCO-AEF3MCLiXT_3djW_SjsAroEcyA3G6dPa2aL-0E9po_bcuJJDO0fNUqf5O3JpB-yQXCBYzTiSOnSd_Bd37XBYRRxiDesTwf0DpetR0U/s400/New+Image.JPG" width="276" /></a></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.5in;"></div><div align="CENTER" style="margin-bottom: 0in;"><span style="font-size: small;"><span lang="en-US">Gambar 1: Penjual Cobek</span></span></div><div align="CENTER" lang="en-US" style="margin-bottom: 0in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Sebagai contoh penerapan konsep kesetimbangan benda tegar, kami menggunakan seorang penjual cobek (lihat gambar 1). Pada gambar di atas, anggap saja panjang batang kayu 1 m, berat total cobek pada masing-masing sisi (kanan & kiri) adalah 20 kg dan 10 kg. Berikut ulasannya :</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><br />
</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqWfhPGXz7cRfgaIDAU1qOuO26WPIKJlpRNJut0LHLpCj7iptcfdDr2ze74hsg91hGFs9bWLtGHnC2ZQwakd2l8DvFhlZ9JEw7LEv-ATwwEnLvNuVKBAjj1IQnFWPkRel7hIodN3bHlUA/s1600/fisika.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="206" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqWfhPGXz7cRfgaIDAU1qOuO26WPIKJlpRNJut0LHLpCj7iptcfdDr2ze74hsg91hGFs9bWLtGHnC2ZQwakd2l8DvFhlZ9JEw7LEv-ATwwEnLvNuVKBAjj1IQnFWPkRel7hIodN3bHlUA/s400/fisika.JPG" width="400" /></a></div><div style="margin-bottom: 0in; text-align: center; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Gambar 2 : Ilustrasi gaya-gaya yang bekerja pada gambar 1</span></span></div><div align="CENTER" lang="en-US" style="margin-bottom: 0in; text-indent: 0.79in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Keterangan :</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">l</span><span lang="en-US"> : panjang batang kayu (m)</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">W1 & W2 : beban cobek (N)</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Wo : berat batang kayu (N)</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">N : gaya normal pada batang kayu (N)</span></span></div><div align="JUSTIFY" lang="en-US" style="margin-bottom: 0in; text-indent: 0.79in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Diketahui :</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">l</span><span lang="en-US"> : 1 m</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">m</span><sub><span lang="en-US">1 </span></sub><span lang="en-US">: 10 kg</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">m</span><sub><span lang="en-US">2 </span></sub><span lang="en-US"> : 20 kg</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">R</span><sub><span lang="en-US">1</span></sub><span lang="en-US"> : x m</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">R</span><sub><span lang="en-US">2</span></sub><span lang="en-US"> : 1-x m</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Ditanya : </span></span> </div><div align="JUSTIFY" style="margin-bottom: 0in; margin-left: 0.79in;"><span style="font-size: small;"><span lang="en-US">Dimanakah anak itu harus meletakkan batang kayu terhadap titik A agar kedua sisi seimbang?</span></span></div><div align="JUSTIFY" lang="en-US" style="margin-bottom: 0in; text-indent: 0.79in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">Jawab :</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;">∑ <span style="font-size: small;"><span lang="en-US">Fx = 0</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;">∑ <span style="font-size: small;"><span lang="en-US">Fy = 0</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">N = W1 + W2</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">m</span><sub><span lang="en-US">orang </span></sub><span lang="en-US">. g = m</span><sub><span lang="en-US">1</span></sub><span lang="en-US">. g + m</span><sub><span lang="en-US">2 </span></sub><span lang="en-US">. g</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">m</span><sub><span lang="en-US">orang </span></sub><span lang="en-US">. 10 = 10 . 10 + 20 . 10</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">m</span><sub><span lang="en-US">orang</span></sub><span lang="en-US"> = </span><span lang="en-US">100+20010</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US"> = </span><span lang="en-US">30010</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US"> = 30 kg</span></span></div><div align="JUSTIFY" lang="en-US" style="margin-bottom: 0in; text-indent: 0.79in;"><br />
</div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;">∑<span style="font-size: small;"><span lang="en-US">τ= 0, anggap titik di mana gaya A bekerja sebagai poros diam</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">τ</span><sub><span lang="en-US">W1 </span></sub><span lang="en-US">= τ</span><sub><span lang="en-US">W2</span></sub><span lang="en-US"> </span></span> </div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">W</span><sub><span lang="en-US">1 </span></sub><span lang="en-US">. r</span><sub><span lang="en-US"> </span></sub><span lang="en-US"> = W</span><sub><span lang="en-US">2 </span></sub><span lang="en-US">. r </span></span> </div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">m</span><sub><span lang="en-US">1</span></sub><span lang="en-US">.g.r</span><sub><span lang="en-US">1</span></sub><span lang="en-US"> = m</span><sub><span lang="en-US">2</span></sub><span lang="en-US">.g.r</span><sub><span lang="en-US">2</span></sub></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">10.10.r</span><sub><span lang="en-US">1 </span></sub><span lang="en-US">= 20.10(1-r</span><sub><span lang="en-US">1</span></sub><span lang="en-US">)</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">100.r</span><sub><span lang="en-US">1 </span></sub><span lang="en-US">= 200 – 200.r</span><sub><span lang="en-US">1</span></sub></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">300.r</span><sub><span lang="en-US">1 </span></sub><span lang="en-US">= 200</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US">r</span><sub><span lang="en-US">1 </span></sub><span lang="en-US">= </span><span lang="en-US">200300</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US"> = </span><span lang="en-US">23</span></span></div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"><span style="font-size: small;"><span lang="en-US"> = 0.67 m </span></span> </div><div align="JUSTIFY" style="margin-bottom: 0in; text-indent: 0.79in;"></div>blog fisika XIIPA3http://www.blogger.com/profile/09125685412187693269noreply@blogger.com1tag:blogger.com,1999:blog-5717878844200348369.post-33248055100192167972011-02-11T21:34:00.002+07:002011-02-11T21:36:27.566+07:00<h3 align="CENTER" style="color: white; line-height: 150%; margin-bottom: 0in; margin-top: 0in;"><span style="font-size: x-large;"><b>Praktikum Momen Gaya </b></span> </h3><div style="line-height: 150%; margin-bottom: 0in;"><br />
</div><div style="line-height: 150%;"><b>A.Tujuan</b></div><div style="line-height: 150%; margin-bottom: 0in;"><b> </b>Mencari nilai Momen Gaya (Torsi (τ)<b>) </b><br />
<b><br />
</b><span style="font-size: small;"><b>B. Alat dan Bahan</b></span></div><ol><li><div align="JUSTIFY" style="font-weight: normal; line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;">Katrol</span></div></li>
<li><div align="JUSTIFY" style="font-weight: normal; line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;">Kertas milimeter block ukuran A3</span></div></li>
<li><div align="JUSTIFY" style="font-weight: normal; line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;">Tali</span></div></li>
<li><div align="JUSTIFY" style="font-weight: normal; line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;">Neraca</span></div></li>
<li><div align="JUSTIFY" style="font-weight: normal; line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;">Penggaris</span></div></li>
<li><div align="JUSTIFY" style="font-weight: normal; line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;">Beban</span> </div></li>
</ol><div style="line-height: 150%; margin-bottom: 0in;"><br />
<b>C. Teori</b><br />
Panjang tali yang telah diukur dalam cm dapat digunakan untuk menemukan gaya tegang tali (T) dalam Newton dengan skala 1 cm = 0,1 N.<br />
Momen Gaya (Torsi (τ)) adalah kemampuan gaya F memutar atau merotasi benda terhadap poros diam.<br />
Rumus:<br />
<b>τ = F x R (rumus vektor)</b><br />
<br />
<b></b>Keterangan:<br />
F: Gaya </div><div style="line-height: 150%; margin-bottom: 0in;">R: Lengan Putar<b><br />
</b><br />
<b>D. Data</b><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6GpmN3Y8hSi3uObUfKmqFvWGIwMairbpMtjYKG7BQHIGVX5t0pxklZbVqP-VCNcYOiwnxHL0F8bhKlTODun6Pa_I4_2KkceyaaM-3kzc3J-HM1DztNIWr9uodLPWMAK87r129CbHAmwE/s1600/scan.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="281" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6GpmN3Y8hSi3uObUfKmqFvWGIwMairbpMtjYKG7BQHIGVX5t0pxklZbVqP-VCNcYOiwnxHL0F8bhKlTODun6Pa_I4_2KkceyaaM-3kzc3J-HM1DztNIWr9uodLPWMAK87r129CbHAmwE/s400/scan.jpg" width="400" /></a></div><br />
</div><br />
<div style="line-height: 150%;"><b>E. Analisis Data</b></div><div style="line-height: 150%;"><br />
</div><table border="1" cellpadding="4" cellspacing="0"><col width="28*"></col> <col width="114*"></col> <col width="114*"></col> <tbody>
<tr valign="TOP"> <td width="11%"><div align="CENTER">No</div></td> <td width="45%"><div align="CENTER"><span style="font-size: small;"><span lang="en-US"><b>Σ Fx</b></span></span> </div></td> <td width="44%"><div align="CENTER"><span style="font-size: small;"><span lang="en-US"><b>Σ Fy</b></span></span> </div></td> </tr>
<tr valign="TOP"> <td width="11%"><div align="CENTER">1</div></td> <td width="45%"><div align="CENTER">Tx1 = 0,35 N</div></td> <td width="44%"><div align="CENTER">Ty1 = 0,4 N</div></td> </tr>
<tr valign="TOP"> <td width="11%"><div align="CENTER">2</div></td> <td width="45%"><div align="CENTER">Tx2 = -0,35 N</div></td> <td width="44%"><div align="CENTER">Ty2 = 0,4 N</div></td> </tr>
<tr valign="TOP"> <td width="11%"><div align="CENTER">3</div></td> <td rowspan="2" width="45%"><div align="CENTER"><br />
</div></td> <td width="44%"><div align="CENTER">Wo = -0,2 N</div></td> </tr>
<tr valign="TOP"> <td width="11%"><div align="CENTER">4</div></td> <td width="44%"><div align="CENTER">W3 = -0.6 N</div></td> </tr>
</tbody></table><div style="line-height: 150%;"><b><span style="font-size: small;"><span lang="en-US"> Σ Fx = 0 N Σ Fy = 0N</span></span></b></div><div lang="en-US" style="line-height: 150%;"><br />
</div><div lang="en-US" style="line-height: 150%;"><br />
</div><div style="line-height: 150%;"><b>Jika A dianggap sebagai Poros Diam...</b></div><table border="1" cellpadding="4" cellspacing="0"><col width="19*"></col> <col width="79*"></col> <col width="78*"></col> <col width="79*"></col> <tbody>
<tr valign="TOP"> <td width="8%"><div align="CENTER"><b><span style="font-size: small;">No</span></b></div></td> <td width="31%"><div align="CENTER"><b><span style="font-size: small;">F</span></b></div></td> <td width="31%"><div align="CENTER"><b><span style="font-size: small;">R</span></b></div></td> <td width="31%"><div align="CENTER"><b><span style="font-size: small;">τ </span></b> </div></td> </tr>
<tr valign="TOP"> <td width="8%"><div align="CENTER">1</div></td> <td width="31%"><div align="CENTER">Tx1 = 0,35 N</div></td> <td width="31%"><div align="CENTER">29.5 cm</div></td> <td width="31%"><div align="CENTER">10,6 Ncm</div></td> </tr>
<tr valign="TOP"> <td width="8%"><div align="CENTER">2</div></td> <td width="31%"><div align="CENTER">Tx2 = -0,35 N</div></td> <td width="31%"><div align="CENTER">11,1 cm</div></td> <td width="31%"><div align="CENTER">3,9 Ncm</div></td> </tr>
<tr valign="TOP"> <td width="8%"><div align="CENTER">3</div></td> <td width="31%"><div align="CENTER">Ty1 = 0,4 N</div></td> <td width="31%"><div align="CENTER">0 cm</div></td> <td width="31%"><div align="CENTER">0 Ncm</div></td> </tr>
<tr valign="TOP"> <td width="8%"><div align="CENTER">4</div></td> <td width="31%"><div align="CENTER">Ty2 = 0,4 N</div></td> <td width="31%"><div align="CENTER">0 cm</div></td> <td width="31%"><div align="CENTER">0 Ncm</div></td> </tr>
<tr valign="TOP"> <td width="8%"><div align="CENTER">5</div></td> <td width="31%"><div align="CENTER">Wo = -0,2 N</div></td> <td width="31%"><div align="CENTER">14,5 cm</div></td> <td width="31%"><div align="CENTER">-2,9 Ncm</div></td> </tr>
<tr valign="TOP"> <td width="8%"><div align="CENTER">6</div></td> <td width="31%"><div align="CENTER">W3 = -0.6 N</div></td> <td width="31%"><div align="CENTER">19,3 cm</div></td> <td width="31%"><div align="CENTER">-11,6 Ncm</div></td> </tr>
<tr valign="TOP"> <td colspan="3" width="69%"><br />
<br />
</td> <td width="31%"><div align="CENTER"><span style="font-size: small;">Σ τ = 0 Ncm</span></div></td> </tr>
</tbody></table><div style="line-height: 150%;"><br />
<br />
</div><div style="line-height: 150%;"><br />
<br />
</div><div style="line-height: 150%; margin-bottom: 0in;"><b>F. Kesimpulan</b> </div><div align="JUSTIFY" style="line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;"> Momen Gaya (Torsi (τ) dapat ditemukan dengan mencari Gaya (F) dan jarak titik A (sebagai titik poros diam) terhadap F (R) sebelumnya pada gambar. F dapat ditemukan bila diketahui panjang tali dalam cm lalu diubah ke Newton untuk menemukan gaya tegang tali (T). Selanjutnya, τ dapat dicari dalam satuan Ncm dengan rumus <b>τ = F x R.</b></span></div><div align="JUSTIFY" style="line-height: 150%; margin-bottom: 0in;"><span style="font-size: small;"> Ketika benda berada dalam keadaan setimbang atau diam, karena tidak ada gaya - gaya yang dapat memutar.</span><br />
<span style="font-size: small;">Dapat dituliskan sebagai: <b>Σ F</b> dan <b>Σ τ = 0</b></span></div><div align="JUSTIFY" style="line-height: 150%; margin-bottom: 0in;"><br />
</div>blog fisika XIIPA3http://www.blogger.com/profile/09125685412187693269noreply@blogger.com2