# FBD and what forces should I include?

In the following situation, how should I draw a FBD and what forces should I include? A metal rod has a string coming out of one end. The other end of the string is attached to a small mass. The metal rod undergoes spinning action by the hand so that the string with the mass attached spins around the metal rod and is parallel to the ground. The metal rod is held in the hand perpendicular to the ground.

Related Introductory Physics Homework Help News on Phys.org
dextercioby
Homework Helper

Does gravity play a role...?

Daniel.

Basically the situation is, you are flinging a string with a mass at one end over your head. The strings flies around in circles kind of like a helicopter. My question is, what forces should I include in the FBD. I know there is centripetal force. There should be gravity pulling down, but what counteracts this force (a normal force?)

Last edited:
dextercioby
Homework Helper
Elastic force,centripetal force,gravity force,and tension in the rod...What other forces would be there...?

Daniel.

I’m just looking for forces acting on the mass at the end of the string

dextercioby