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Simple Machines Concepts (Grades 11-12)

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Simple Machines Concepts

Instructions: Use the concepts in the word bank to fill-in the missing information for each of the ten statements below. Be sure to read each statement carefully.

WORD BANK

ramp[math]" "[/math] wedge[math]" "[/math] screw[math]" "[/math] tension[math]" "[/math] efficiency[math]" "[/math] output force[math]" "[/math] lever[math]" "[/math] fulcrum[math]" "[/math] gear[math]" "[/math] machine[math]" "[/math]output arm[math]" "[/math] wheel and axle[math]" "[/math] gear ratio[math]" "[/math] input force[math]" "[/math] ideal mechanical advantage[math]" "[/math] block and tackle[math]" "[/math] mechanical advantage
1. 
Real-world machines generate less output force than ideal machines because the                            is usually less than 100%.
2. 
The gear and rear tire of a multiple-speed bicycle is an example of a                                   .
3. 
The ratio of the radius of a wheel to the radius of its axle is the                                                            of that wheel-and-axle system.
4. 
The switchbacks of a road going up the side of a mountain are an example of a/an               .
5. 
A wheel with 42 teeth was turned, causing a wheel with 14 teeth to turn. The system has a/an                            of three.
6. 
When you use a crowbar to remove a nail from a piece of wood, the distance from the crowbar’s pivot point to the nail is the                           .
7. 
The ratio of the output force to the input force is called the                                               .
8. 
When mules turn the wheel of a wheel and axle system, the axle delivers the                               .
9. 
When a spike is pounded into a railroad tie using a sledgehammer, the sledgehammer provides the                             .
10. 
When you turn a/an                 , it converts the rotational motion into translational motion into the material.
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