i did this last year, hope i remember..
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so for cam and follower, the eccentric cam with follower is used in toys, the snail cam with follower is used where u need a sudden drop umm cant think of any app ryt now, anyways crank and slider is used in door handles, pedal bins(dustbins)....rachet and pawl used in spanners, winder where u need rotation only in one direction...
By the way our teacher gave us this site for reference last time during our IGs:
technologystudent.com