A 2m long stick is placed horizontally so it is balanced per…

A 2m long stick is placed horizontally so it is balanced perfectly at a point in the middle. A 1.6kg mass is placed at the far left end of the stick. Where on the right side of the stick must a 4.1kg mass be placed so the entire system is in equilibrium? Be sure to specify if your position is measured from the center of the stick or from the end. Which of the masses produces a positive torque and which produces a negative torque? Explain your answer.

A block of wood has these dimensions: length = 0.45m, width…

A block of wood has these dimensions: length = 0.45m, width = 0.25m, height = 0.15m. It has a density of 850kg/m^3. The block is floating in a tub of water. What is the mass of the block of wood? How much extra mass would have to placed on top of the block so that the top surface of the block is even with the surface of the water?