C)If both cyclists have 170 mm cranks on their bikes, what will be the mechanical advantage (considering only the movement of the feet with a constant force for walking and riding), in percent, that each rider will have achieved over walking the same distance? (This canbe found by dividing the distance wallked by the distance the feet move in riding.) Two friends are planning to go on RAGBRAI (Register's Annual Great Bike Ride AcrossIowa) next year. One is planning to ride a mountain bicycle with 26 in. tires, and the otherhas a touring bicycle with 27 in. tires. A typical RAGBRAI is about 480 mi long.(a) How many more revolutions will the mountain bike tires make in that distance thanthe touring bike?(b) Typical gearing for most bicycles ranges from 30 to 50 teeth on the chain wheel (frontgears) and 12 to 30 teeth on the rear cog. Find how many more revolutions of the pedalsthe mountain biker will make during the trip, using an average pedaling time of 85 percentof the trip and a 42-tooth chain wheel and a 21-tooth rear cog for your calculations. An aircraft has a glide ratio of 12 to 1. (Glide ratio means that the plane drops 1 m ineach 12 m it travels horizontally.) A building 45 m high lies directly in the glide path tothe runway. If the aircraft clears the building by 12 m, how far from the building does theaircraft touch down on the runway?

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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C)If both cyclists have 170 mm cranks on their bikes, what will be the mechanical advantage (considering only the movement of the feet with a constant force for walking and riding), in percent, that each rider will have achieved over walking the same distance? (This can be found by dividing the distance wallked by the distance the feet move in riding.)

Two friends are planning to go on RAGBRAI (Register's Annual Great Bike Ride Across
Iowa) next year. One is planning to ride a mountain bicycle with 26 in. tires, and the other
has a touring bicycle with 27 in. tires. A typical RAGBRAI is about 480 mi long.
(a) How many more revolutions will the mountain bike tires make in that distance than
the touring bike?
(b) Typical gearing for most bicycles ranges from 30 to 50 teeth on the chain wheel (front
gears) and 12 to 30 teeth on the rear cog. Find how many more revolutions of the pedals
the mountain biker will make during the trip, using an average pedaling time of 85 percent
of the trip and a 42-tooth chain wheel and a 21-tooth rear cog for your calculations.

An aircraft has a glide ratio of 12 to 1. (Glide ratio means that the plane drops 1 m in
each 12 m it travels horizontally.) A building 45 m high lies directly in the glide path to
the runway. If the aircraft clears the building by 12 m, how far from the building does the
aircraft touch down on the runway?

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