LKS_gaya - Math-Physics
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GAYA Macam Gaya, Hukum Newton Nama : …………………. Kelas : …………………. SCORE : 1. Resultan dua buah gaya yang arahnya berlawanan dan segaris adalah 14 N. Jika besar gaya yang searah dengan gaya resultan tersebut 26 N, berapakah besar dan arah gaya lainnya? ........................................................................................................................................................................ ........................................................................................................................................................................ 2. Massa sebuah batu di bumi 40 kg. Jika percepatan gravitasi bumi 9,8 N/kg dan percepatan gravitasi bulan seperenam percepatan gravitasi bumi, berapakah berat batu yang hilang ketika dibawa ke bulan? ........................................................................................................................................................................ ........................................................................................................................................................................ 3. Seorang astronaut menimbang benda yang massanya 1 kg di Bumi dan di Bulan. Gravitasi di bulan adalah 1/6 kali gravitasi di Bumi. Percepatan gravitasi di bumi adalah 10 m/s2. a. Berapakah massa benda di Bumi dan di Bulan? .................................................................................................................................................................. .................................................................................................................................................................. b. Berapakah berat benda di Bumi dan di Bulan? .................................................................................................................................................................. .................................................................................................................................................................. c. Mengapa hal itu bisa terjadi? Jelaskan. .................................................................................................................................................................. .................................................................................................................................................................. 4. Sebuah benda memiliki gaya gesek statis maksimum 20 N. Apa yang akan terjadi pada benda tersebut jika benda ditarik dengan gaya 10 N, 20 N, dan 25 N. ........................................................................................................................................................................ ........................................................................................................................................................................ 5. Dua buah gaya searah dan segaris masing-masing 10 N dan 40 N. Berapa resultan kedua gaya itu? ........................................................................................................................................................................ ........................................................................................................................................................................ 6. Sebuah benda bermassa 100 gram ditarik dengan gaya 20 newton. Berapakah besar percepatan benda yang bergerak? ........................................................................................................................................................................ ........................................................................................................................................................................ 7. Seorang anak mendorong balok yang massanya 5 kg dengan gaya 4,5 N. Berapakah percepatan balok tersebut? ........................................................................................................................................................................ ........................................................................................................................................................................ 8. Sebuah bola yang massanya 1,5 kg bergerak dengan percepatan 4 m/s2. a. Berapakah resultan gaya yang bekerja pada bola itu? .................................................................................................................................................................. .................................................................................................................................................................. b. Jika resultan gaya ini dikerjakan pada bola yang massanya 2 kg, berapakah percepatan gerak bola yang dihasilkan? .................................................................................................................................................................. .................................................................................................................................................................. Sumber : BSE IPA Wasis, Saeful, Agus, Krisno, Diana Puspita 9. Percepatan gravitasi di bumi = 10 N/kg; Jupiter = 26 N/kg, dan Mars = 3,6 N/kg. Tentukan berat bendabenda berikut di masing-masing planet! a. Mangga yang massanya 0,25 kg. ........................................................................................................................................................................ ........................................................................................................................................................................ b. Seorang astronout yang massanya 65 kg. ........................................................................................................................................................................ ........................................................................................................................................................................ 10. Suatu pengukuran berat di permukaan Bumi menunjukkan 98 N jika percepatan gravitasinya 9,8 N/kg. Berapakah penunjukan neraca pegas jika benda tersebut diukur di permukaan Bulan yang percepatan gravitasinya 1,6 N/kg? ........................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................ 11. Jelaskan perbedaan konsep massa dan berat! ........................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................ 12. Jika berat benda di suatu tempat 50 N dan percepatan gravitasi bumi di tempat itu 10 m/s 2, hitunglah massa benda tersebut! ........................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................ 13. Sebuah bola logam bermassa 4 kg terletak di atas lantai. Berapakah berat bola logam jika percepatan gravitasi di tempat itu 9,8 m/s2? ........................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................ 14. Hitunglah massa sebuah benda yang beratnya 65 N jika percepatan gravitasi di tempat tersebut 9,8 m/s2! ........................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................ 15. Sebuah kubus kayu massanya 5 kg. Berat kubus kayu tersebut di suatu tempat adalah 48 N. Berapa percepatan gravitasi di tempat tersebut? ........................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................ Sumber : BSE IPA Wasis, Saeful, Agus, Krisno, Diana Puspita
