Monday, January 14, 2013

Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier

Berikut adalah kumpulan contoh soal latihan / ujian / final / kuis mengenai materi campuran meliputi Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier, dengan adanya soal ini diharapkan agar anda  lebih menguasi materi terkait. Selamat menjawab … :)

Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier 
Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier 3
Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier 4
Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier 5

B. Jawablah soal-soal di bawah ini!

1. Seorang berada di atas menara yang tingginya 20 m di atas permukaan tanah. Orang tersebut kemudian melempar sebuah batu dengan kecepatan awal 30 m/s, dengan arah condong ke atas dengan sudut elevasi α (sin α = 0,6) jika g = 10 m/s^2, hitunglah ketinggian maksimum yang dicapai bola pada pelemparan tersebut!

2. Sebuah benda dengan massa m3 berada dalam medan gravitasi benda dengan massa m. Kuat medan gravitasi pada titik dimana benda m’ berada = 8,4 m/s^2 dan benda m’ mendapat gaya gravitasi sebesar 16,8 N. Berapa besar benda m’?

3. Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier 6

 

Pegas x, y, z yang identik akan memanjang 5 cm bila digantungi beban 1,5 kg secara terpisah. Jika ketiga pegas dirangkai seperti gambar di samping dan digantungi 6 kg maka hitunglah:
a. pertambahan panjang masing-masing pegas
b. pertambahan panjang keseluruhan sistem pegas!

 

 

4. Seseorang yang bermassa 40 kg sedang melakukan terjun bebas dari ketinggian 3 meter dari permukaan air. Berapa kecepatan orang tersebut saat menyentuh air? Bila dapat masuk ke dalam air sedalam 1 meter, berapa gaya penahan rata-rata dari air terhadap orang tersebut?

5. Soal Ulangan Gerak, Hukum Newton, Gaya Pegas, Usaha, Energi, Daya dan Momentum Linier 7

Gambar di samping melukiskan bola besi digantung dengan tali dan setimbang di titik A. Massa bola besi 200 gram. Sebuah peluru dengan massa 10 gram ditembakkan dengan kecepatan 100 m/s dengan sudut elevasi 60o. Pada ketinggian maksimum peluru menumbuk bola besi dengan e = 1⁄2.
Berapa tinggi bola besi naik dari titik setimbangnya?


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