# Chapter 14 Vocab

 Grooved wheel with a rope or cable wrapped over it. Pulley two circular objects of different sizes that are attached in such a way that they rotate together Wheel and Axle any rigid rod or plank that pivots, or rotates, about a point. Lever an inclined plane wrapped around a cylinder or post. Screw an inclined plane that moves Wedge a flat, sloped surface inclined plane a combination of simple machines Compound Machine a machine that works with only one movement Simple Machine the ratio of the output work to the input work. calculated from this equation Workout divided by Workin x 100% Efficiency (eff) The ratio of the output force to the input force Calculated by: Force(out) divided by Force(in) Mechanical Advantage (MA) the force the machine applies Output Force the work you apply on the machine Input Force how quickly work is done can be calculated by: work (in joules) divided by time (in seconds) and is measured in WATTS Power Done when a force causes an object to move in the same direction that the force is applied. It is measured in joules Can be calculated as: force (in newtons) X Distance (in meters) Work Authoradamah115 ID107793 Card SetChapter 14 Vocab DescriptionForces and Simple Machine Updated2011-10-10T19:01:46Z Show Answers