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Please Help Please?


A very tough question regarding...?
In a chain drive mechanisms,which can be found in bicycles with the pedal attached to the driven sprokect,the driver sprocket rotates through 360 degree.If the transmission ration of this chain drive mechanism is 0.65,at what angle will the driven sprocket rotates.

Next,A girl weighing 50kg sits at one end of a plank.When a load is placed on the other end,avertical distance of 60cm is detected while the girl is raised by 30c.Calculate the transmission ratio of the plank

Pls help and explain :)

As regards to your first question, 240degrees. The angle of the driven sprocket is 0.65 times the angle of the driver sprocket, so 360x0.65 = 240

Sorry, dont know the other question. Sounds familiar like a GCSE question. Try the google for "transmission ration calculations" for a formulea
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