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Across 3. cylindrical drum to which a wheel concentric with the drum is firmly fastened 5. rigid bar pivoted on a fixed point 7. a metal fastener having a tapered shank with a helical thread 10. a wheel, with a grooved rim for carrying a line 11. ability to do or act 12. a mechanical apparatus or contrivance 13. consists of two or more simple machines put together 14. the state or quality of being efficient

Down 1. the ratio of output force to the input force applied to a mechanism 2. is the force which an effort force must overcome in order to do work on an object 3. a piece of hard material with two principal faces meeting in a sharply acute angle 4. applied on the object 6. a plane surface inclined to the horizon 8. an apparatus consisting of interrelated parts with separate functions 9. exertion or effort directed to produce or accomplish something