...the rim of a 20-cm can filled..? ....water. The cross section of the can is a circle with a diameter of 20cm. The 30-cm mark lies exactly on the center of the circle. A 40-gm ball is tied to the 100-cm mark of the stick and a wooden block of weight W is placed near the zero end to maintain balance. What is the magnitude of W and its distance from the zero-end such that the meter stick will not overturn to either side while the ball is there or when the ball is removed.