Jawabanmu

Jawaban paling cerdas!
2014-05-04T09:00:26+07:00
A. 1putaran = 2 π rad
jadi kecepatan anguler(ω) = 2π rad/s

b. rumus momen inersia = I=mr²
m= 5kg; r=d/2 = 80/2 cm = 40 cm = 0,4 m;

*I=mr²
 I=5.(0,4)²
 I=5.(0,16)
 I=0,8 kgm²

c.rumus Ek = Iω²/2

*Ek=0,8.(2π)²/2
 Ek=0,8.4π²/2
 Ek=1,6π² joule
2 5 2