+1 vote
in Machine Dynamics by (34.3k points)
In the given figure, m1=10 Kg, m2=30Kg and m=50 Kg, if r=0.3m, l=1m, find l2 = 0.5m, find r1 in m.

(a) 1.5

(b) 0.75

(c) 3

(d) 6

The question was asked at a job interview.

My question comes from Balancing of a Single Rotating Mass By Two Masses Rotating in Different Planes in division Balancing of Rotating Masses of Machine Dynamics

1 Answer

0 votes
by (38.6k points)
Right choice is (b) 0.75

To explain I would say: M1r1l = mrl2

10xr1x1 = 50 x 0.3 x0.5

10r1 = 7.5

l2 = 0.75m.

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