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- 1. KOMPUTER DALAM PEMBELAJARAN FISIKA “GERAK VERTIKAL” OLEH : HENI NOFIRA/1106299 UNIVERSITAS NEGERI PADANG
- 2. Standar Kompetensi: Menerapkan konsep dan prinsip dasar kinematika dan dinamika benda titik Next
- 3. Kompetensi Dasar: Next Menerapkan Hukum Newton sebagai prinsip dasar dinamika untuk gerak lurus, gerak vertikal, dan gerak melingkar beraturan
- 4. Indikator : Menerapkan Hukum Newton pada gerak Vertikal Next
- 5. A. KE ATAS B. KE BAWAH C. JATUH BEBAS PENUTUP Presentasi Koputer dalam Pembelajaran Fisika
- 6. GERAK VERTIKAL KE ATAS PERNAHKAH ANDA MELEMPAR SEBUAH BOLA KE ATAS ? V BISA ANDA JELASKAN BAGAIMANA BOLA TERSEBUT BISA NAIK KE ATAS DAN KEMUDIAN BALIK LAGI KE PERMUKAAN BUMI ? NEXT
- 7. MATERI Agar benda dapat bergerak ke atas maka benda harus mempunyai Kecepatan awal, pada saat benda berada di titik puncak kecepatan benda pada saat itu nol sehingga bola jatuh lagi ke permukaan bumi akibat adanya gaya Gravitasi Rumus : a) Vt=vo-gt b) ht=vot-½ gt2 c) vt2=vo2-2gh NEXT
- 8. Keterangan rumus : Vo = kecepatan awal (m/s) Vt = kecepatan pada saat t (m/s) t = waktu benda bergerak (s) g = percepatan gravitasi (m/s2) h = panjang lintasan benda bergerak (m) NEXT
- 9. 1. Sebuah bola dilempar ke atas dengan kecepatan awal 20 m/s, ketinggian maksimum yang dicapai adalah ……m Penyelesaian: diketahui: Vo= 20 m/s Vt2=Vo2-2gh h = Vo2/2g = ( 202 )/ 2.10 = 20 m g = 10 m/s2 ditanya : h ? jawab: Pada saat benda dititik tertinggi, kecepatan benda nol (vt = 0 ) NEXT
- 10. 1. Sebuah bola dilempar ke atas dengan kecepatan awal 20 m/s, Maka waktu yang digunakan untuk mencapai titik tertinggi adalah … sekon. 2. Benda dilempar dengan kecepatan tertentu sehingga mencapai tinggi maksimum 80 m. Besarnya kecepatan awal benda adalah … m/s. BACK MENU
- 11. g v DASAR TEORI Gerak vertikal ke bawah terjadi jika sebuah benda dari ketinggian tertentu dilepas dengan kecepatan awal Rumus: a) Vt=vo+gt b) ht=vo t+½ gt2 c) vt2= vo2+2gh NEXT
- 12. CONTOH SOAL : Sebuah benda dilempar lurus ke bawah dengan kecepatan 10 m/s dari atas pohon dengan ketinggian 30 meter. Berapa besar kecepatan benda setelah 2 sekon dilempar! Penyelesaian: Diketahui: ditanyakan: Vo= 10 m/s Vt ? h = 30 m Jawab : t =2s Vt = Vo + g.t = 10 + 10.2 = 30 m/s NEXT
- 13. 1. Sebuah benda dilempar lurus ke bawah dengan kecepatan 10 m/s dari atas pohon dengan ketinggian 30 meter. Berapa besar kecepatan benda pada saat mencapai tanah! 2. Kelereng dilemparkan ke bawah dari ketinggian 20 meter dengan kecepatan awaltertentu. Jika waktu yang diperlukan benda sampai di tanah 4 sekon, hitunglah kecepatan awalnya. BACK MENU
- 14. JATUH BEBAS DASAR TEORI Gerak jatuh bebas dapat terjadi jika benda dijatuhkan dari ketinggian tertentu tanpa kecepatan awal atau Vo=0, Rumus: a) vt= gt b) ht=½ gt2 c) vt2= 2gh NEXT Vo=0
- 15. PERNAHKAH SAUDARA MENDENGAR BERITA ORANG TERJUN DARI LANTAI TERTINGGI DI SEBUAH GEDUNG APARTEMENT ??? ATAU PERNAH MELIHATNYA LANGSUNG ?? FENOMENA APAKAH ITU ??? NEXT
- 16. NEXT
- 17. Ketiga kasus tersebut merupakan GERAK JATUH BEBAS NEXT
- 18. CONTOH SOAL : Sebuah bola basket dijatuhkan dari ketinggian 20 meter tanpa kecepatan awal. Hitunglah waktu benda sampai di tanah! Penyelesaian: diketahui: ditanyakan: h = 10 m t? Vt ? g = 10 m/s2 jawab : h = ½ gt2 Vt= g.t t = √ (2h/g) = 10. 2 t = √(2.20/10) = 20 m/s t = 2 sekon NEXT
- 19. LATIHAN Sebuah bola dijatuhkan dari ketinggian tertentu. Jika kecepatan benda saat mencapai tanah 40 m/s dan nilai percepatan gravitasi bumi 10 m/s2 hitunglah: a. Waktu benda selama di udara b. Kecepatan benda pada detik ke 2 s, 3s c. Tinggi benda saat dijatuhkan BACK MENU
Editor's Notes
- Transparent light effect(Basic)To reproduce one of the shapes on this slide, do the following:On the Home tab, in the Slides group, click Layout and then click Blank. On the Home tab, in the Drawing group, click Shapes, and then under Basic Shapes click Oval (first row, second option from the left). Press and hold SHIFT to constrain the shape to a circle, and then drag to draw a circle on the slide. On the Home tab, in the bottom right corner of the Drawing group, click the Format Shape dialog box launcher. In the Format Shape dialog box, click Line Color in the left pane, and then select No line in the Line Color pane. Also in the Format Shape dialog box, click Fill in the left pane, select Gradient fill in the Fill pane, and then do the following:In the Type list, select Radial.Click the button next to Direction, and then click From Center (third option from the left).Under Gradient stops, click Add or Remove until three stops appear in the drop-down list.Also under Gradient stops, customize the gradient stops that you added as follows:Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 60% (third row, fourth option from the left).In the Transparency box, enter 80%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, and then under Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 70%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left). In the Transparency box, enter 100%.On the Home tab, in the Drawing group, click Shape Effects, point to Soft Edges, and then click 10 Point. To reproduce the other shapes on this slide, do the following:Select the circle on the slide. On the Home tab, in the Clipboard group, click the arrow under Paste, and then click Duplicate. Repeat this process to create a total of 10 circles. On the slide, drag the circles to position them at random intervals. For each circle, press and hold SHIFT and then drag the adjustment handles to resize as needed.To reproduce the different color and transparency effects in each of the shapes, do the following:Select the shape. On the Home tab, in the bottom right corner of the Drawing group, click the Format Shape dialog box launcher. In the Format Shape dialog box, click Fill in the left pane, and then select Gradient fill in the Fill pane. Under Gradient stops, click Add or Remove until three stops appear in the drop-down list, and then do the following:For the first and third (small circle below larger circle) circles from the left:Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 60% (third row, fourth option from the left).In the Transparency box, enter 90%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, and then under Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 85%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left). In the Transparency box, enter 100%.For the second circle from the left, do not change the Gradient stops settings in the Format Shape dialog box. For the fourth circle from the left (large circle above third circle):Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 60% (third row, fourth option from the left).In the Transparency box, enter 80%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, and then under Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 70%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 60% (third row, fourth option from the left). In the Transparency box, enter 100%.For the fifth circle from the left:Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 88%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, and then under Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 71%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left). In the Transparency box, enter 100%.For the sixth circle from the left:Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 227, Green: 209, Blue: 143.In the Transparency box, enter 84%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 223, Green: 205, Blue: 75.In the Transparency box, enter 85%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 214, Green: 195, Blue: 84.In the Transparency box, enter 100%.For the seventh circle from the left:Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 60% (third row, fourth option from the left).In the Transparency box, enter 60%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, and then under Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 60%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left). In the Transparency box, enter 100%.For the eighth circle from the left, do not change the Gradient stops settings in the Format Shape dialog box. For the ninth circle from the left (small brown circle below larger blue circle):Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 227, Green: 209, Blue: 143.In the Transparency box, enter 70%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 223, Green: 205, Blue: 75.In the Transparency box, enter 85%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 214, Green: 195, Blue: 84.In the Transparency box, enter 100%.For the tenth circle from the left (large blue circle above ninth circle):Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 60% (third row, fourth option from the left).In the Transparency box, enter 80%.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 50%.Click the button next to Color, and then under Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left).In the Transparency box, enter 74%.Select Stop 3 from the list, and then do the following: In the Stop position box, enter 100%.Click the button next to Color, and then under Theme Colors click Dark Blue, Text 2, Lighter 40% (fourth row, fourth option from the left). In the Transparency box, enter 100%.To reproduce the background on this slide, do the following: Right-click the slide background area, and then click Format Background. In the Format Background dialog box, click Fill in the left pane, select Gradient fill in the Fill pane, and then do the following:In the Type list, select Radial.Click the button next to Direction, and then click From Center (third option from the left).Under Gradient stops, click Add or Remove until two stops appear in the drop-down list.Also under Gradient stops, customize the gradient stops that you added as follows:Select Stop 1 from the list, and then do the following:In the Stop position box, enter 0%.Click the button next to Color, click More Colors, and then in the Colors dialog box, on the Custom tab, enter values for Red: 65, Green: 68, Blue: 97.Select Stop 2 from the list, and then do the following: In the Stop position box, enter 99%.Click the button next to Color, and then click Black, Text 1 (first row, second option from the left).