Simple machines + work and power Flashcards
Machine
a device which helps make work easier by changing the size, direction, or both size and direction.
Simple machine
a device that completes a task and makes work easier.
work input
the work done ON a machine
work output
work done BY a machine
mechanical advantage
a number/factor which tells how many times a machine multiplies force.
formula for calculating mechanical advantage
MA=output force/input force
Efficiency
the measure of how close the machines output is to its input
formula for efficiency
Efficiency=(output force/input force)X100=?%
lever
machine consisting of a bar that pivots at a fixed point
what is the fixed of a lever called
fulcrum
inclined plane
a machine which is a straight, slanted surface, ramp.
wedge
a machine which consists of a double inclined plane that moves. (Axe)
Screw
a machine which is a inclined plane wrapped around a central cylinder
wheel and axle
a machine consisting of 2 circular objects of different sizes.
pulley
a machine consisting of a grooved wheel which holds a rope or cable
