Calculate the torque of a rod pendulum?

Hello,

I'm trying to calculate the equation of motion of a rod pendulum using the torque approach. However, the pendulum's pivot point isn't at the beginning, but at 1/3 of its length. My problem now is how to set up the torques, since there are two torques during the oscillation (since the pivot point divides the pendulum into two parts).

I tried that but I don't know if it's correct (in the picture).

(1 votes)
Loading...

Similar Posts

Subscribe
Notify of
1 Answer
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
Doktorelektrik
1 year ago

I don’t want to solve this for you. (inappropriate practice as an e-technic….)

But I see this mistake in the approach:

  • The forces for the assumed correct lever arm cannot be equal
  • The different signs of torque contributions will be described by the lever arm vector….

My colleagues from the mechanics know that much better to treat.

Good luck!