Two objects are said to be in parallel when they both act on thesystem in the same way, e.g., two forces are in parallel if theyhave the same direction and are applied at the same point.
A light rod of length 34.6 cm is held aloft from the ceiling by twosprings attached to its ends. The left spring has a stiffness of23.4 kg/s2 and equilibrium length of 23.2 cm and theright spring has a stiffness of 18.8 kg/s2 andequilibrium length of 25.3 cm. A ring weighing 610 g is placed 25.4cm from the left spring.
(a) How much does the left spring stretch?
.067 m
(b) How much does the right spring stretch?
.2334 m
Now, mathematically slide the ring to the point that levels therod.
(c) At what distance from the left spring should you place the ringin order for the rod to be level?
.14147 m
(d) How far from the ceiling is the rod when it's level?
.383 m
Now consider modelling the two springs as if there were only onespring that held the ring aloft.
(e) What is the equilibrium length of the spring?
(f) How much does the spring stretch when the ring is placed onit?
(g) What is the stiffness of the spring?
need help on e-g
