(Solved): The figure below shows a uniform rod of mass m and length L that is released from rest and allowed ...

The figure below shows a uniform rod of mass m and length L that is released from rest and allowed to rotate clockwise without friction about an axis (O) that passes through its left end and is perpendicular to the page. c 1 () The rod rotates clockwise about its left end until it hits the circle and weight acts down A circle of radius R is fixed so that its center is a distance D (where R D-R, it will eventually hit the circle. Determine the time it takes for the rod to hit the circle. You should determine this time using the inputs: g = 9.8 m/s2, D = 5 m, R = 4 m and first when L = 4 m and next when L = 2 m. Hint: You may find the Law of Cosines from planar trigonometry to be useful in this problem. = =