Kecepatan Sudut Kecepatan Anguler

73 Gerak Melingkar 0-?,3-09,-020,68074926,092,960.0;,,9 ;8:,=4;08094 4?927,3 , ;04:0;?,9B, - 60.0;,,9=?? . 7,5?7490,546,5,45,4:,=0;0, .8 . ;8 ;?,,98094 ;?,,9= C , 04:0 ,,7,360-,746,9,4106?09=4 C = - 0.0;,,9=?? 434?92092,980922?9,6,9 0 2 f 2 C 8 ,= . ,45,4 .8 8 ,5?7490,434?9280922?9,6,9 0 R 8 8 1,6 8= ,4;04:0;?,,99B, =60.0;,,9=??9B, 8 ,=,97,5?7490,9B, ,,7,3 8= 9?680924,4749,=,974926,,9=0-,9B,6 6,74 ;?,,9=0-?,3-09,80807?6,9A,6?8094 0,;,;04:0,9106?09=420,6,9-09,0=0-? 0-?,3:,?-49;08-,926474=46808474642,4= 092,38,9-0;?,;,, ;80,;,6,3 , 106?09=49B, - ;04:09B, . 60.0;,,9=??9B, 7,5?7490,;,,;49224:, ?,?= 80924,4 749,=,9 8074926, 092,9 809209,,4=0;0,8::B,92,4?=9B, 8 092,9607,5?,9685,84?9260.0;,,9=?? =0;0,8::0=0-?,7,8,= 07,=6,9;09204,960.0;,,97490,,960.0;,,9 =?? 0-?,3-,?446,092,9,74608?4,94;?,6,9 46,;,95,92,74 800,9A,6?B,924-??36,9 ?9?6 807,6?6,9 =,? ;?,,9 ,,7,3 =06:9 -0,;,6,360.0;,,97490,-,?0=0-? ,,+ Tes Kompetensi Subbab A

B. Percepatan Sentripetal

0-?,3-09,B,92807,6?6,920,68074926,-0,?,980847464 ;0.0;,,9B,92,,39B,809?5?446;?=,74926,,90.0;,,9494 4=0-?;0.0;,,9=094;0,7,,20,67??=-0,?,9,,360.0;,,9 -09, 0,; =034922, 06: 60.0;,,99B, 5?2, 0,; ,, 20,6 8074926,-0,?,9;0.0;,,9B,924847464-01?92=48092?-,3,,3 20,6,420,67??=8095,420,68074926,-0,?,9703=0-,- 4?;0.0;,,9;,,20,68074926,=07,7?809?5?60;?=,B,924=0-? ;0.0;,,9=094;0,7,,?;0.0;,,9,4,7,94-047,8-,92 ,,20,68074926,,,360.0;,,97490,;,,=04,;446=07,7? 809B4922?9274926,,9,9,,39B,=07,7?-0?-,30?-,3,906: 60.0;,,94944=0-,-6,9,,9B,;0.0;,,9=094;0,7 ,, 546,60.0;,,9-09,;,,446 ,9-0?? ?? ,9 8,6,-0,60.0;,,9 E 02442,=0-,92?9 092,9=02442, =034922,,6,94;0:703;0-,9492,9-046? Gambar 4.4 Arah kecepatan linear pada gerak melingkar. O R K L S v 1 –v 1 N M v 2 v = v 2 – v 1 s v –v 1 Contoh 4.3 Kata Kunci • laju linear • kecepatan sesaat 74 Mudah dan Aktif Belajar Fisika untuk Kelas X s s 07,95?9B, ,6,9 4;0:703 ;0=,8,,9 ,,? =034922, ;0.0;,,9 ,,,, 8095,4 a t 9?6 =07,92 A,6? t 80906,49:7446 3,8;4-048;4092,9446=0 34922, 80906,49:7,;?9 t 4,6=,8,092,9,634922, 0,;4808474643,2,B,924=0-?;0.0;,,9=0=,,B,92-0=,9B, 4?74=6,9=0-,2,4-046? 748 t 748 t 7036,09, 748 t 8,6,;0.0;,,9=0=,,,;, 4?74=6,9=0-,2,4-046? Percepatan pada gerak melingkar selalu menuju ke pusat lingkaran. Ingatlah 2 E 0=,;0.0;,,9=094;0,7;,,20,68074926,-0,?,9=07,7? 0,;4=04,;446,9,,39B,=07,7?809?5?60;?=,74926,,90.0;,,9 =094;0,7494-0-,94927??=092,96?,,607,5?,97490,-09,703 6,09, 607,5?,9 7490, =0-,9492 092,9 607,5?,9 ,92?70 -0=, ;0.0;,,9=094;0,75?2,80?;,6,91?92=46?,,03,,;607,5?,9 ,92?709B, Dapatkah suatu benda dipercepat jika kelajuannya konstan? Tantangan untuk Anda E 46, ;,, 0 4=?-=4?=46,960 0 0 ,;,4?74=6,9=0-,2,4-046? 2 7036,09, ;0=,8,,90=0-?,;,4?74==0-,2,4-046? 00,92,9 -0=,;0.0;,,9=094;0,78= -0=,60.0;,,97490,8= 5,45,4749,=,98 106?09=4C E Tugas Anda 4.1 Dua buah roda dihubungkan seperti pada gambar. Jari-jari roda pertama 5 cm jari-jari roda kedua 10 cm. Berapakah kecepatan roda 2 jika kecepatan sudut roda pertama adalah 200 rpm? 1 2 r 2 r 1