Latihan Quizizz Dinamika Rotasi dan Fluida
Quiz
•
Physics
•
11th Grade
•
Hard
Keke Bubu
Used 6+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dua bola masing² massanya m1 = 2 kg dan m2 = 3 kg dihubungkan dengan batang ringan tak bermasa seperti di gambar. Jika sistem bola diputar pada sumbu titik α, maka besar momen inersia sistem bola adalah...kg m²
0,24
0,27
0,35
0,31
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Batang AB sepanjang 2 m dipengaruhi gaya Fa = 20 N Fb = Fc = 30 N seperti gambar. Jika jarak AB = 2AC , AC = 2AP dan massa batang diabaikan, maka besar momen gaya terhadap titik P adalah..N m
47,5
62,5
40
72,5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebuah benda berotasi dengan momen inersia 2.5 * 10 ^ - 3 kq m ^ 2 dan kecepatan sudut awal 5 rad s ^ - 1 . Agar benda itu berhenti dalam waktu 2,5 sekon, maka besar momen gaya yang harus dikerjakan adalah...
2,5 x 10-⁴
7,5 x 10-⁴
5 x 10-⁴
7,5 x 10-³
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Penari balet tersebut berputar dengan tangan terentang pada kecepatan sudut 9 rpm di atas lantai licin dengan momen inersia 6 kg m ^ 2 Kemudian kedua tangannya dilipat menyilang di dada sehingga kecepatan sudutnya menjadi 12 rpm. Momen inersia penari balet pada kondisi akhir adalah....kg m2
7
6,5
4,5
3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Letak koordinat titik berat benda adalah....
4, 32/7
4, 37/7
32/7, 4
4,5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Titik berat bangun di bawah ini adalah...
(3/2, 4/5)
(5/2, 5/4)
(2, 7/4)
(2, 4/5)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada gambar di atas, Z adalah titik berat batang AB yang massanya 10 kg. Jika sistem dalam keadaan setimbang, maka massa beban C adalah...
50 kg
10 kg
20 kg
4 kg
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