Levers
the point around which a lever pivots or turns
fulcrum
A simple machine consisting of a wheel with a rod running through its axis that acts as the pivot point
wheel and axle
a simple machine that consists of a plane whose opposite ends are at different heights or points
inclined plane
the energy added to a system by an external force when it acts on the system to move it
a force that causes a lever to turn around a fixed point
torque
A simple machine that consists of a wheel with teeth on its perimeter
gear
a simple machine consisting of two inclined planes attached at an acute angle and used to spread a material apart as it is forced into the material
wedge
Work is measured in what unit?
In which class of levers is the fulcrum in the middle (between the input and output forces)?
first class
a simple machine that consists of a wheel and axle system with a groove around the perimeter of the wheel in which a rope, cable, or belt moves with the wheel as it rotates
pulley
A simple machine that consists of an inclined plane wrapped around a cone or cylinder in a circular or spiral pattern
screw
distance
In which class of lever is the input force in the middle (between the output force and the fulcrum)
third class
For a block and tackle system, the IMA increases with the number of ________________________ _______________.
rope segments
a machine that combines two or more simple machines
compound machine
Power is the rate of doing ___________.
work
In which class of lever is the output force in the middle (between the input force and the fulcrum)?
second class
The SI unit of power is the ___________.
watt