# Thread: What is the force N and P of the cart and Pendulum for?

1. I am trying to understand the force present in the system below. I found this picture online and I would like to ask what is the force N and P of the cart and Pendulum for?

ctms.engin.umich.edu/CTMS/Content/InvertedPendulum/System/Modeling/figures/pendulum2.png

I tried to google it but i am not really sure what is the term of this force called and not much result is found for this 2 force. May I seek some help on understanding the force N and P, what is their purpose and why is it present?

Thank You!

2.

3. Originally Posted by d.bryan
I am trying to understand the force present in the system below. I found this picture online and I would like to ask what is the force N and P of the cart and Pendulum for?

ctms.engin.umich.edu/CTMS/Content/InvertedPendulum/System/Modeling/figures/pendulum2.png

I tried to google it but i am not really sure what is the term of this force called and not much result is found for this 2 force. May I seek some help on understanding the force N and P, what is their purpose and why is it present?

Thank You!
There is little point in trying to work out what is going on in a diagram like this without a written explanation of what it represents. But if you had that, you probably would not be asking the question.

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