+MR+EMR 09). A rod of mass m and length L with a particle of mass m attached to its one 5mR end rotates in the xy plane about a fixed axis oriented parallel to the z-axis through the other end as shown in the figure at right. At an instant when the rod makes an angle with the x-axis as shown, the angular acceleration of the particle-rod system is: A). 36 g sin 521 B). 2g cos 0 3L 9g cose 8L D). 4g cose 3L X m m