Multiple Select Question
Select all that apply
Identify the examples of constrained motions. More than one answer may be correct.
The back and forth motion of a piston inside a cylinder
Cranks rotating about a fixed axis
A shaft falling from a height of 10 m from ground

Constrained motions refer to movements that are restricted by some external forces or mechanisms. For instance, the back and forth motion of a piston inside a cylinder is a classic example of constrained motion due to the guiding walls of the cylinder that define its path. Similarly, cranks rotating about a fixed axis illustrate constrained motion since they pivot around a specific point, limiting their movement to a circular arc.

On the other hand, a shaft falling from a height of 10 m is not a constrained motion. It is a free motion influenced by gravity, allowing it to fall freely without any restricted path. This distinction is crucial when analyzing mechanical systems and understanding how different components interact.