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physical science
| Question | Answer |
|---|---|
| energy | ability to cause change |
| mechanical advantage | ratio of output force to input force |
| joules | the SI units for energy and work |
| work | force applied through distance |
| A -------- does work with only one movement of the machine | simple machine |
| A -----is a combination of two or more simple machines | compound machine |
| what are the formulas | w=fd m=out over in e=out over in x100% |
| list 3 machines and explain how they help | pulley=increase and redirect force screw=increase force wheel and axel=speed up easier and roll |
| explain how machines can be useful if the output works always less than input work | they reduce the layered force needed |
| what is the one way to increase the efficiency of a machine | decreasing the friction will increase efficiency |
| describe the work done on an object when the force on the object and the motion of that object are perpendicular | no work is done |
| for work to be done the direction of the force and the direction of the displacement must be -------- | parallel |
Created by:
paigeesmoak1