1. Bola pejal berjari-jari R dari keadaan diam menggelinding pada bidang datar oleh gaya F seperti ditampilkan pada gambar. Jika momen inersia bola pejal = 2 2 maka nilai α setara dengan. A. ∝= 2 5
B. ∝= 7 5
C. ∝=2 5
D. ∝= 5 7
E. ∝=7 5
5
2. Perhatikan gambar penari balet berikut ! Penari balet tersebut berputar dengan tangan terentang pada kecepatan sudut 9 rpm di atas lantai licin dengan momen inersia 6 kg. m2. Kemudian kedua tangannya dilipat menyilang di dada sehingga kecepatan sudutnya menjadi 12 rpm. Momen inersia penari balet pada kondisi akhir adalah .
A. 7,0 kg. m2
B. 6,5 kg. m2
C. 6,0kg. m2
D. 4,5kg. m2
E. 3,0 kg. m2
3. Sistem pada gambar berikut dalam keadaan setimbang. Bila batang AB homogen dan memiliki berat 70 N, maka besar gaya tegangan tali (T) adalah .
A. 50N
B.100N
C.150N D.250N E. 450N

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Part a determine the magnitude of the x component of f using scalar notation. fx f x = nothing lb request answer part b determine the magnitude of the y component of f using scalar notation. fy f y = nothing lb request answer part c determine the magnitude of the z component of f using scalar notation. fz f z = nothing lb request answer provide feedback figure1 of 1a force vector acting on a ring attached to the ground is shown in the xyz space together with its x, y, and z components lying on the corresponding positive axes. the ring is located at the origin. force f is located in the first octant. f makes an angle of 60 degrees with its x component and an angle of 45 degrees with its y component. a force vector acting on a ring attached to the ground is shown in the xyz space together with its x, y, and z components lying on the corresponding positive axes. the ring is located at the origin. force f is located in the first octant. f makes an angle of 60 degrees with its x component and an angle of 45 degrees with its y component.

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth