A uniform bar of mass M=0.140 kg, and length l=42.0 cm has a small object of mass mA=0.055 kg glued to its left end and another small object of mass mB=0.150 kg glued to the other end. The two small masses can each be treated as point masses. The y-coordinate axis passes through the midpoint of the bar and the x-axis is along the length of the bar as shown in the figure below. Round your answers to 3 significant figures. (a) Using the coordinate axes shown above what is the x-coordinate of the centre of mass of the system? xcm= Answer 5.78 cm For parts (b) to (c) take counterclockwise torques as positive. (b) What is the torque produced by the weight wA of object A about the centre of mass? τz= Answer 8.62 N⋅m
