PHYSICS-CHAPTER 3
work
force x distance
power
the rate at which work is done
mechanical advantage
the ratio of the output force to the input force
efficiency
The percentage of the input work that is converted to output work
simple machine
A machine that does work with only one movement
lever
A simple machine that consists of a rigid bar that pivots about a fixed point.
fulcrum
the pivot point of a lever
wheel and axle
a simple machine consisting of two circular objects of different sizes; the wheel is the larger of
the two circular objects
inclined plane
a flat, sloped surface
wedge
An inclined plane that moves
screw
An inclined plane wrapped around a cylinder
pulley
A simple machine that consists of a rope that fits into a groove in a wheel
work
force x distance
power
the rate at which work is done
mechanical advantage
the ratio of the output force to the input force
efficiency
The percentage of the input work that is converted to output work
simple machine
A machine that does work with only one movement
lever
A simple machine that consists of a rigid bar that pivots about a fixed point.
fulcrum
the pivot point of a lever
wheel and axle
a simple machine consisting of two circular objects of different sizes; the wheel is the larger of
the two circular objects
inclined plane
a flat, sloped surface
wedge
An inclined plane that moves
screw
An inclined plane wrapped around a cylinder
pulley
A simple machine that consists of a rope that fits into a groove in a wheel
