**SIMPLE MACHINE, WORK , POWER AND ENERGY**

**mechanical advantage**

**machine**

**irreversible**

**watt**

**tension**

**input arm**

**horsepower**

**input**

**work**

**fulcrum**

**output**

**power**

**simple machines**

**efficiency**

**1. A unit of power equal to 746 watts is called one ____.**

**2. ____ is the rate of doing work.**

**3. Force multiplied by distance is equal to ____.**

**4. The measurement unit of power equal to one joule of work performed**

**in 1 second is called the ____.**

**5. The ramp, the lever, and the wheel and axle are examples of ____.**

**6. Pushing on the pedals of a bicycle is an example of the ____ to a**

**machine.**

**7. Moving a heavy load is an example of the ____ from a lever.**

**8. To calculate a machine’s ____, you divide the output force by the**

**input force.**

**9. A ____ is a device with moving parts that work together to**

**accomplish a task.**

**10. The pivot point of a lever is known as its ____.**

**11. The side of a lever where the input force is applied is the _____.**

**12. The pulling force in a rope is known as ____.**

**13. ____ is the ratio of work output to work input and is usually**

**expressed as a percent.**

**14. A process with less than 100% efficiency is _____**