Calculating the tension of a string.

A solid object made out of lead has a volume of 24.0 cm3 and is supported (from above) by a string while the object is completely submerged in water. What is the tension in the string?

True and false questions regarding buoyancy and density.

Five solid objects made of different materials are placed in a tub of water. The objects are cubes made of wood, ice, aluminum, steel and gold. All of the objects have the SAME mass. The objects are released and allowed to reach some equilibrium position. Note that some of the objects will float, while others will sink. Which of the following statements are true? (Give ALL correct answers) A) The wood cube would displace its own volume in water B) The aluminum cube would feel the least buoyant force C) The wood cube and the ice cube would both feel the greatest buoyant force D) The ice cube would float E) The wood cube and the ice cube would displace the most water

flow rate

An ideal fluid flows at 15.5 m/s in a horizontal pipe. Further down the line, the pipe diameter changes to one-half its original diameter. What is the flow speed of the fluid in this new section of pipe?

person on beam

A 11.2 m uniform beam of weight 140 N is supported by two ropes at the ends. If a 420 N person sits 3.5 m from the left end of the beam, what is the tension in the right rope?

Determining the location of a fulcrum to balance a system.

Two metal disks are taped to a meter stick. The mass of the meter stick is 540.0 g. Disk 1 has a mass of 500.0 g and is located at the 29.0 cm mark. Disk 2 has a mass of 300.0 g and is located at the 76.0 cm mark. At what position along the meter stick should you place a fulcrum so that the entire system (meter stick plus the 2 masses) are balanced?