Chapter 9: Q10Q (page 230)
Figure 9–38 shows a cone. Explain how to lay it on a flat table so that it is in (a) stable equilibrium, (b) unstable equilibrium, (c) neutral equilibrium.
Short Answer
The following are the positions of the cone in (a) stable equilibrium (b) unstable equilibrium, and (c) neutral equilibrium.
Step by step solution
Understanding stable and unstable equilibrium
Stable equilibrium takes place only if an object returns to its original position after been displaced.
On the other hand, in unstable equilibrium, the object will accelerate away from its original location as soon as it gets slightly displaced.
Explanation for the position of the cone in stable equilibrium
If the cone is placed flat at the base of the table, it will be in stable equilibrium. To return to its original position, the cone is tilted slightly from this position and then released.
Explanation for the position of the cone in unstable equilibrium
When the cone is balanced on its tip, it can be said that it is in unstable equilibrium. Also, considerable displacement in the cone from this position makes it fall and collapse.
Explanation for the position of the cone in neutral equilibrium
In order to achieve neutral equilibrium, the cone is to be placed on its side.
The following diagram represents the position of the cone.
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