chloeconlon2014
09.07.2019 •
Physics
Are all solid natural non living matter on earth rock?
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Ответ:
THE AWNSER IS NO I THINK
Ответ:
Option (A)
Explanation:
m1 = 0.2 kg
m2 = 0.3 kg
L = 2 m
Let the centre of mass is at a distance d from 0.2 kg.
So, m1 x d = m2 x (L - d)
0.2 x d = 0.3 x (2 - d)
2 d = 6 - 3d
5 d = 6
d = 1.2 m
Moment of inertia about the centre of mass,
I = m1 x d^2 + m2 x (L - d)^2
I = 0.2 x 1.2 x 1.2 + 0.3 x 0.8 x 0.8
I = 0.288 + 0.192
I = 0.48 kg m^2
Thus, option (A) is correct.