- #1
ajaysabarish
- 58
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in this video
http://www.physicsgalaxy.com/lectures/1/44/234/Solved-Example-2#12(see only the question)
the method illustrated is integration but i thought of an alternate method,
moment of inertia of half disc with radius r2 is 1/2mr2^2 and that of half disc with radius r1 is 1/2mr1^2.so the moment of intertia of system must be equal to difference of these moment of inertia since half disc with radius r2 is cutoff from radius r1,so shouldn't moment of inertia be subtracted too?
http://www.physicsgalaxy.com/lectures/1/44/234/Solved-Example-2#12(see only the question)
the method illustrated is integration but i thought of an alternate method,
moment of inertia of half disc with radius r2 is 1/2mr2^2 and that of half disc with radius r1 is 1/2mr1^2.so the moment of intertia of system must be equal to difference of these moment of inertia since half disc with radius r2 is cutoff from radius r1,so shouldn't moment of inertia be subtracted too?