Please provide an example of INTERNAL and EXTERNAL torque

[zinedine_88]

Can anybody please give me an example of INTERNAL and EXTERNAL force.

I was told by my Professor that there is only internal Torque at the moment when you are running toward a marygoround and grab so of the handles.
PLEASE EXPLAIN ME WHY.

 

[zinedine_88]

i meant INTERNAL OR EXTERNAL TORQUE!