Equilibrium of a Suspended Mobile

l

1

1.

m

1

1.

l

2

0.5

m

2

0.5

l

3

0.5

m

3

0.25

m

4

0.25

A mobile consisting of connected weights and massless rods is shown. Each mass

m

i

hanging from a lever arm

l

i

produces a net torque that contributes to the equilibrium configuration of the system.