A simple newtons law proplem

  • Thread starter nil1996
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  • #1
nil1996
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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 [Broken]


Homework Equations



none

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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Answers and Replies

  • #2
Simon Bridge
Science Advisor
Homework Helper
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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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