Physics Final Questions & Answers

Physics Final Questions & Answers A constant net torque is applied to a rotating object. Which of the following best describes the object's motion? 10 - CORRECT ANSWER- The object will rotate with constant angular acceleration. A cylindrical rod has equal and opposite forces applied parallel to the surface of its circular ends. The forces are directed toward the center of the rod. What type of stress is this rod subject to? 11 - CORRECT ANSWER- The rod is subject to shear stress. A cylindrical rod has equal and opposite forces applied perpendicular to its circular ends. The forces are directed away from the rod, stretching the rod. What type of stress is this rod subject to? 11 - CORRECT ANSWER- The rod is subject to tensile stress. A cylindrical rod has equal and opposite forces applied perpendicular to its circular ends. The forces are directed toward the rod, compressing the rod. What type of stress is this rod subject to? 11 - CORRECT ANSWER- The rod is subject to compressive stress. A gas-filled balloon is submerged in a fluid. As a result, the balloon is subject to inward forces from all sides. How does the volume of the balloon change? 11 - CORRECT ANSWER- The volume of the object decreases. A girl and a boy are riding on a merry-go-round that is turning at a constant rate. The girl is near the outer edge, and the boy is closer to the center. Who has greater angular displacement? 9 - CORRECT ANSWER- Both the girl and the boy have the same nonzero angular displacement. A girl and a boy are riding on a merry-go-round that is turning at a constant rate. The girl is near the outer edge, and the boy is closer to the center. Who has greater linear speed? 9 - CORRECT ANSWER- The girl has greater linear speed. A girl and a boy are riding on a merry-go-round that is turning at a constant rate. The girl is near the outer edge, and the boy is closer to the center. Who has greater tangential acceleration? 9 - CORRECT ANSWER- Both the girl and the boy have zero tangential acceleration. A girl moves quickly to the center of a spinning merry-go-round, traveling along the radius of the merry-go-round. Which of the following statements are true? 10 - CORRECT ANSWER- The angular speed of the system increases.