Efficiency measures how much of the work put into a machine is converted into useful output work. Because every real-world machine encounters friction, some energy is always lost as heat. Therefore, the efficiency of a real machine is . 2. Essential Formulas
For ramp (inclined plane) problems, the ideal mechanical advantage is calculated using the input distance (the length of the ramp's slope) and the output distance (the vertical rise): Efficiency measures how much of the work put
To increase efficiency, decrease friction (e.g., lubrication) or improve the design to reduce necessary input force. decrease friction (e.g.
Keep these equations handy when solving Section 14.3 review questions: Efficiency measures how much of the work put
The following answer key is derived from a common worksheet for this textbook section. The questions are designed to test your understanding.