hesswheelaxle

=__Wheel and Axle __=  By: Carly B, Caria P, Sammy S, Sonny P

__Definition of a wheel and axle: __ -Two cylindrical objects connected at an axle.

__Everyday examples: __ -skateboard -car -rollerblades -windmill/fan -door knob -unicycle -motor -pencil sharpener -4-wheeler -rolling pin -motorcycle -unicycle -weight/dumbbell

__Greatest Mechanical Advantage: __ The bigger the wheel and the smaller the axle the bigger the mechanical advantage.

__An experiment to show how a wheel and axle is easier: __ Materials: 1 skateboard 1 string 2 dictionaries spring scale 1 meter area

Experiment: 1. Gather all the materials. 2. Weigh the books by their selves. 3. Put the skateboard upside-down and put the 2 dictionaries on top, use the string to pull the skateboard one meter, see how much force in N it takes, repeat 3 times 4. Repeat with skateboard right-side-up. 5. Find an average for both. 6. Find a conclusion.

 These are some websites for more information:  http://www.edinformatics.com/math_science/simple_machines/wheel_and_axle.htm http://www.tooter4kids.com/Simple_Machines/wheel_and_axle.htm http://www.brainpop.com/science/motionsforcesandtime/wheelandaxle http://encyclopedia.farlex.com/wheel+and+axle

__Pictures of Wheel and Axles ____: The picture below is of a door knob. __ == = =  The picture below shows wheels of a fan. ==