Question

5. A 200g block of lead and a 200g block of aluminum are placed on an underwater scale. For which block will the scale read a greater weight?

                  A. The lead block    B. The Aluminum Block            C. Both will have the same weight       D. Neither will have any weight

_____ 8. What is the ideal mechanical advantage (IMA) of a “block and tackle” pulley system with 5 pulleys?

         A. 1                    B. ½                             C 2                             D. 5                             E. 1/5                         F. No way to tell

4. A 15.4 kN Force is applied to a master hydraulic cylinder of cross sectional area 2.0cm². What is the Force output by the slave cylinder if the cross sectional area of the slave is 10.0 cm²

     A there is no output Force                  B. 3.1kN                     C. 15.4kN                  D. 77 kN                    E. 385kN

6. The energy “lost” in an inelastic collision

       A actually disappears        B. is converted to heat            C. is converted to sound         D, is converted to Kinetic energy

10.                 A solid 2.0kg lead block (r=13.6x10³kg/m³) and a solid 2.0kg aluminum block (r=2.88x10³kg/m³) are resting at the bottom of a 1.00 meter deep fish aquarium. Which of the following statements are true?

A.      The buoyant force on the lead block is greater          B. The buoyant force on the aluminum block is greater

C.      The buoyant force on both blocks is equal                 D. it depends on whether the aquarium is filled with water or air

Answer 1