the ratio of the magnitude of the resistance (R) and effort (E) forces; friction losses are taken into consideration.

 a tool used to complete work with less effort.

any device that only requires a single input force to do work.

?= F * D

a rigid bar resting on a pivot (the fulcrum) used to make moving objects easier, consist of an effort force, load, and fulcrum

is a wheel and axle that support a cable or belt along the wheel’s circumference; pulleys are used to transfer force or speed and lift loads.

consists of a flat surface at an incline (angle) that is used to move heavy objects to a higher level.

a triangular shaped tool; tapers to a thin edge that functions as a moving inclined place, effort is applied to the top of the height.

an inclined plane wrapped around a cylinder or a wheel and axle used to create rotary motion; used as a threaded fastener; can change a rotary motion into a linear motion

All simple machines do not require human energy to function.

The difference is that a simple machine reduces the amount of effort required to do the work or accomplish the job.

When we use a simple machine to move something, we actually need to go a greater distance to accomplish the same amount of work.

What are the two components of work?

What is the amount of pulling/pushing on an object?

What is the formula for work?

Work is measured in what?

What is the unit of measure for force?

Friction is a force of motion that resists the motion of one object against another.

How many simple machines are there?