LDS hukum kekekalan momentum

LEMBAR DISKUSI SISWA (LDS)

Satuan Pendidikan : SMA

Kelas/Semester        : X / II

Materi Pokok          : Impuls dan Momentum

Judul Percobaan    : Hukum Kekekalan Momentum

Waktu                      : 15 Menit

Nama Kelompok :

1.	4.
2.	5.
3.	6.

A.      Kompenti Dasar

3.10 Menerapkan konsep momentum dan impuls, serta hukum kekekalan momentum dalam kehidupan sehari-hari

Indikator:

Mendiskusikan hukum kekekalan momentum dalam kehidupan sehari-hari

B.       Tujuan

Siswa dapat merumuskan hukum kekekalan momentum dalam kehidupan sehari-hari

C.      Diskusi Masalah

Sebuah roket meluncur ke ruang angkasa, pada saat meluncur roket mengeluarkkan gempulan asap

D.      Rumusan Masalah

a.       Bagaimana merumuskan hukum kekekalan momentum?

E.       Hipotesis

 

F. Diskusi Masalah

1.        Mengapa roket itu harus menyemburkan api atau asap ke belakang?

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2.        Rumuskan secara matematis rumus hukum kekekalan momenutum?

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3.        Benda A dan B masing-masing bermassa 4 kg dan 5 kg bergerak berlawanan arah seperti gambar

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Keduanya kemudian bertumbukan dan setelah tumbukan kedua benda berbalik arah dengan kecepatan A = 4 m/s dan kecepatan B = 2 m/s. Berapa kecepatan benda B sebelum tumbukan ?

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4.        Sebutkan contoh lain penerapan hukum kekekalan momentum pada kehidupan sehari-hari?

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G. Kesimpulan