Answer Happy

Each end of a long slender bar of mass m and length is attached to a small roller of negligible mass and friction such that, when released, the bar will roll down the circular half-pipe surface in a clockwise sense. The normal forces between the rollers at A and B and the half-pipe surface are denoted as NA and NB. respectively. The acceleration of the bar's centre of mass along the normal- tangential directions shown (ie, e , and ê ) are denoted as a and a respectively, and its angular acceleration is a. Which is the correct sum of moments on the bar taken about point A as it is released from rest from the configuration shown? IMPORTANT: Terms that may be identified as being equal to zero MUST NOT appear in the equation (this could include quantities that are defined in the problem statement). B é