Posted by **Anonymous** on Friday, December 21, 2012 at 12:45am.

The bars are in equilibrium, each 5 m long,

and each weighing 82 N. The string pulling

down on the two bars is attached 0.6 m from

the fulcrum on the leftmost bar and 0.5 m

from the left end of the rightmost bar. The

spring (of constant 32 N/cm) is attached at

an angle 29

◦

at the left end of the upper bar.

5 m

0.6 m

5 m

0.5 m

32 N/cm

29

◦

6 kg

If the suspended mass is 6 kg, by how much

will the spring stretch? The acceleration of gravity is 9.8 m/s

2

.

Answer in units of cm

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