Mechanical Engineering - Theory of machines - Discussion
Discussion Forum : Theory of machines - Section 2 (Q.No. 19)
19.
A rotor supported at A and B carries two masses as shown in the below figure. The rotor is
Discussion:
10 comments Page 1 of 1.
Mithin said:
4 years ago
Thanks for explaining @Hk Vb.
Vinay BEL said:
5 years ago
Statically balanced is the right answer.
(1)
Tarik said:
5 years ago
Answer will be B as the couple will exist if it is calculated with any of the ends.
Bhupender Dahiya said:
6 years ago
Static and dynamic balance.
The couple also balanced.
Both mass and distances are same.
m * r = m * r.
The couple also balanced.
Both mass and distances are same.
m * r = m * r.
Motasem said:
7 years ago
No, the correct one is only statically balanced.
Arvind said:
7 years ago
Yeah, the force is balanced here.
But static balancing condition is that masses should be in the same plane how this is possible.
But static balancing condition is that masses should be in the same plane how this is possible.
RAJIV KUMAR said:
7 years ago
Correct answer should be B because forces are balanced but couple is not.
Nimish said:
7 years ago
Only statically balanced is correct.
Abhishek said:
9 years ago
Well said @Hk Vb.
Only statically balanced as the unbalanced couple remains.
Only statically balanced as the unbalanced couple remains.
HK VB said:
1 decade ago
Actually the information provided is not sufficient. If m1 & m2 are two masses revolving diametrically opposite to each other in different planes such that m1*r1 = m2*r2.
The centrifugal forces are balanced, but an unbalanced couple of magnitude m1*r1*l = m2*r2*l is introduced. The couple acts in a plane that contain the axis of rotation and the two masses. Thus the couple is of constant magnitude but varying direction.
The centrifugal forces are balanced, but an unbalanced couple of magnitude m1*r1*l = m2*r2*l is introduced. The couple acts in a plane that contain the axis of rotation and the two masses. Thus the couple is of constant magnitude but varying direction.
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