| A | B |
|---|
| work | the measure of the force required to make something move |
| machine | a device that helps to do work by changing the size or direction of a force. |
| power | the measure of the amount of work done in a certain period of time. |
| joules | the amount of work equal to the force of 1 N moving an object a distance of 1 meter. |
| mechanical advantage | the number of times a machine multiplies a force; the ratio of the force that comes out of a machine to the force that is put into the same machine. |
| simple machines | machines that have only one or two parts. |
| lever | a simple machine ; a bar used for prying or dislodging something. |
| wheel and axle | a simple machine consisting of a lever connected to a shaft. |
| pulley | a simple machine that consists of a wheel that is free to spin on an axle. |
| inclined plane | a simple machine consisting of a flat, sloping surface; a ramp. |
| wedge | a simple machine consisting of a inclined plane; used to pry objects apart. |
| screw | a simple machine composed of an inclined plane wrapped around a cylinder. |
| compound machines | two or more simple machines combined to do work. |
| watt | name of the metric unit that measures 1joule of work done each second |
| effort arm | part of the lever you push on |
| resistance arm | part of the lever that pushes on the object you want to move |
| fulcrum | the point on which a lever pivots. |
| first-class lever | When the fulcrum is between the resistance and effort force |
| second-class lever | when the resistance force is between the fulcrum and the effort force |
| third-class lever | when the effort force is between the resistance force and the fulcrum |
| windlass | used when a type of wheel and axle |
| Is 2 single wedges back to back | double wedge |
| A person moving needs to get his couch into the back of his truck what simple machine should he use? | An inclined plane |
| A man needs to chop a big log for a fire. What simple machine should he use? | A wedge |
| Jana needs to cut out an article from a magazine for a project. What simple machine should she use? | A lever |
| An ax is a compound machine. What 2 simple machines is it made up of? | A lever and a wedge |
| Name the six simple machines. | A lever, a wheel and axle, a pulley, an inclined plane, a wedge, and a screw |
| The formula for power is? | work/time to do work |
| The formula for work is? | force x distance |
