3.1.5 Mechanical devices GapFill

Motion in a straight line is  lineargravitationalreciprocationvelocity ratio motion whereas motion that moves backwards and forwards in a straight line is  reciprocationgravitationallinearvelocity ratio. The type of motion demonstrated by a bicycle wheel is  potentialkineticlinearrotary motion. Levers can be classified as one of three types: first, second or third order. Each type of lever has three distinct parts;  a ratioa pulleya followera fulcrum, load and effort. The effort is also known sometimes as the  inputmechanical advantagepivotoutput. When working out the mechanical advantage of a lever system, a simple calculation can be used. MA is equal to the  forceloadoutputfulcrum divided by the effort. Linkages are another type of mechanical device. A  followerbell crankpulleybelt is a form of linkage as is a push/pull linkage. The output motion of a linkage can change in three ways: direction, distance and  diameterangleforceweight. A mechanical device used to covert rotary motion into reciprocating motion is a  bevel gearcamfollowerlever. Drop and eccentric are two different types of cam, and  pear shapedapple shapedpulley shapedlever shaped is a third shape of cam. Two gears that mesh together form  a driver gearan idler geara driven geara simple gear train. When you require a gear system that needs input and output direction of rotation to be the same,  an idler geara simple geara driver geara driven gear is placed in between the two gears. A different mechanism that can be used to transfer rotary motion from one shaft to another is  pulley and beltlever systemrack and pinionlinear system.