Deciding holonomic constraint by drawing a picture

[Pushoam]

Homework Statement

Homework Equations

The Attempt at a Solution

I have not understood the question.

So, could anyone please put some more light upon the question?

 

[BvU]

Why don't you do the experiment with a ball or some other sphere ?
Compare with a coin rolling along a ruler

 

[Pushoam]

Thanks, I did the coin experiment and understood the question. It's constraint of rolling motion of a coin, l = r $\theta$.