Bike+by+Paula+B.

Choose one product that you particularly like and complete the following questions.
 * Mechanisms: Bike** **by Paula B.**


 * ( add a picture, google sketch-up model, animation. etc.)** media type="custom" key="23144546"

** The elements that moves in my object are the wheels, the pedals, the chain, the sprockets and the chainrings. ** ** 3) **** How are the moving parts joined together? (picture, text, video...) ** The chain joins the sprockets and the chainrings (all of them are basically gears). The chain is hooked to the gears' tooth. Screws connect the gears to the wheels. The pedals are connected to the main chainring by the crank arm.
 * 1) What do you like/****dislike about your product?** - I like the bike because it's an economic vehicle and because it can ransport you without harming the environment. Cycling is also a healthy activity. - I dislike my product because moving with it is slower and harder than moving by car.
 * 2) What is moving in your object? (add a video, animation, or pictures with the element that works when the object is moving...)**

**3) W**** hat movement is produced? (circular, linear...) **
 * The elements that moves in my object are the wheels, the pedals, the chain, the sprockets and the chainrings **
 * and they move in a circular way, producing a linear movement (or circular if you change the direction) **

** The moving parts are used for moving the bike. The kinetic energy produced by your legs when you moves the pedals is transmitted by the gears and the chain, moving the wheels and moving the bike at the same time. **  ** The mechanism/s in my object works like this: **media type="youtube" key="oauDyIu_swM" width="560" height="315" ** 6) Curiosities **   __//** DID YOU KNOW THAT...? **//__
 * 4) Why are the moving parts used? (text...)**
 * 5) How do they work? (video, text...) **
 * 1) The most expensive bike in the world costs 102418 $.
 * 2) There're around ten million bikes in the world.
 * 3) You can park twenty bikes in the same space you'll fill parking a car.

**__8.- Picture Gallery __**