How Do Friction and Normal Force Act on a Rod at an Angle?

AI Thread Summary
The discussion revolves around analyzing the forces acting on a rod of mass m, positioned at a 60-degree angle to the ground, immediately after being released. The key focus is on determining the normal reaction force and the frictional force, given that friction prevents the rod from sliding. Participants emphasize the importance of drawing a free-body diagram to visualize the forces and clarify the calculations. The user expresses confusion regarding the vertical force components and the motion in the y-axis, seeking assistance in resolving these issues. Understanding the implications of friction on the rod's motion is crucial for solving the problem accurately.
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Homework Statement


Here is a rod of mass m(as shown in figure)which is released from rest.The angle made by the rod with the ground is 600. Assume that the force of friction is enough to prevent sliding of the rod.Find the normal reaction and the frictional force just after the rod is released.
http://img138.imageshack.us/img138/1282/xvug.png


Homework Equations



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The Attempt at a Solution


I have calculated the components of the forces on the axis-one along the rod and other perpendicular to the rod.I have used ƩFx=0(as there is no motion in the direction along the rod-if i am correct). But i am not able to compute ƩFy as there is motion in y axis.I am confused please help.
 
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Did you draw a free-body diagram for the rod?
If there were no friction, what would the motion of point A be?
What would be the reaction force there?
 

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