The discussion revolves around calculating the net torque about an axis through point A in a massless rod. Participants are examining the components of forces acting on the rod and how these relate to the torque produced about the specified axis.
There is ongoing dialogue about the correct interpretation of angles and components in relation to the forces acting on the rod. Some participants have provided insights into the reasoning behind using sine or cosine for specific forces, while others are still grappling with these concepts. The discussion is productive, with hints and clarifications being shared.
Participants are working under the assumption that the rod is massless, which raises questions about the dynamics involved in the problem. There is also mention of potential typographical errors in the textbook regarding the description of the rod's mass.
Sorry, I misunderstood your picture.paulimerci said:
Another way to look at the angle problem is to write the torque equation as ##\tau = \textbf{F} \times \textbf{d}##. The magnitude of the torque will be ##\tau = F d ~ sin( \theta )## where the angle is between and measured counterclockwise. To do this draw a quick sketch and place the tails of d and F at the same point.paulimerci said:
paulimerci said:
Thank you!Lnewqban said: