Question

8: As a grade-school project, students construct a mobile representing some of the major food groups.
Their completed artwork is shown below. Find the masses mi, m2, and m3 that are required for a
perfectly balanced mobile.

Answer 1

Answer:

m1=0.72kg m2=0.48kg m3=0.98

Explanation:

12*m1=18*m2, so 2*m1=3*m2

6*(m1+m2)=24*.03, so 2*m1+2*m2=2.4

so, 5*m2=2.4, m2=0.48 then, m1=0.72

(m1+m2+0.3+0.2)*18=31*m3

1.7*18=31*m3

m3=0.98