6. Which is not an example of simple machine? A. paper B. screw C. lever D. Wedge

7. What simple machine is found on the floor of a bathtub? A. screw B. inclined plane C. wedge D. pulley

8. Which of these is an example of a wedge? A. skateboard B. broom C. stairs D. knife

9. What does a screw is made up of? A. spike B. springs C. threads D. strings

10. What is used to hold things together and pull or push an object together? A, screw B. inclined plane C. wedge D. lever​