Unit 1 Physics June 2013

1. Which of the following is a vector quantity?





2. Which of these statements about work is not correct?





3. Concrete pillars may be used to support heavy roofs. Concrete is used because it has a





Use the following graph to answer Questions 4 to 6:

4. At 2.6 s the magnitude of the displacement from the starting position is





5. How can the velocity of the ball at time t = 2.5 s be determined from the graph?





6. Which of the following graphs could be the velocity-time graph for the ball?





Use the following diagram to answer Questions 7 and 8:

7. Select the row in the table that correctly describes the situation when the air in the balloon is heated.





8.





9. A steel wire and a brass wire, with identical cross sectional areas and lengths, are fused together. The Young modulus for steel is approximately twice that of brass. The combined wire is stretched. The ratio (extension of steel wire)/(extension of brass wire) is approximately





10.