Dinamika rotasi dan keseimbangan benda tegar
Quiz
•
Physics
•
11th Grade
•
Practice Problem
•
Medium
Idah Ruhayati
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20 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Bola A bermassa = 60 gram dan bola B = 40 gram dihubungkan batang AB (massanya diabaikan).
Jika kedua bola diputar dengan sumbu putar di P maka momen inersia sistem adalah….
12,25 .10 –4 kg m2
13,50 .10 –4 kg m2
14,50 .10 –4 kg m2
15,50 .10 –4 kg m2
16,25 .10 –4 kg m2
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan gambar!
Jika massa batang di abaikan Hitung momen gaya terhadap B adalah ....
1,2 Nm
2,4 Nm
3,6 Nm
4,8 Nm
6,4 Nm
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Tiga buah partikel dengan massa m, 2m, 3m dipasang pada ujung kerangka yang terletak pada bidang xy. Jika sistem diputar terhadap massanya diabaikan. Sistem sumbu y, maka momen inersia sistem adalah ....
5 ma
7 ma
5 ma²
6 ma2
7 ma²
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika poros perputaran oleh gaya gaya yang bekerja berada pada titik pusat persegi, maka hitunglah momen gaya total ....
-8 Nm
0 Nm
1 Nm
4 Nm
8 Nm
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Seorang penari balet berputar dengan tangan terentang sepanjang 150 cm dan kecepatan sudut 10 radian/sekon. Lalu penari melipat tangannya menjadi 75 cm sepanjang siku. Berapa kecepatan sudut akhir ?
20 rad/s
25 rad/s
40 rad/s
45 rad/s
80 rad/s
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebuah silinder pejal yan massanya 10 kg dan jari-jarinya 10 cm menggelinding dengan kecepatan 8 m/s. Energi kinetik silinder tersebut adalah ....
320 J
480 J
1.380 J
1.600 J
1.980 J
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sebuah benda berbentuk silinder berrongga (I=mR2) bergerak menggelinding tanpa tergelincir mendaki bidang mirig kasar dengan kecepatan awal 10 m/s. Bidang miring itu mempunyai sudut evalasi ɵ dengan sin ɵ = 0,5. Jika percepatan grafitasi g = 10 m.s-2 dan kecepatan benda itu berkurang menjadi 5 m.s-1 maka jarak pada bidang miring yang ditempuh benda tersebut adalah ....
2,5 m
5 m
7 m
10 m
12,5 m
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