Physics mind map
: a device that makes work easier by magnifying or changing the direction of a force
Simple
Machine
W = weight
F = Force
wa = weight arm
fa = force arm
h = height
ℓ = length
Wedge
examples: axes, knives, and chisels
used to separate, cut, or split objects apart
two inclined planes placed back to back
Inclined planes
formula of inclined plane : (F x ℓ = W x h)
examples: ramps and slides
makes it easier to move things to a higher location
is a flat surface that is raised at one end
Screw
examples :of screw: screws, nuts, bolts, light bulbs
used to hold objects together
an inclined plane wrapped around a cone/cylinder to form a spiral
Wheel and axle
examples: bicycles, cars, doorknobs, pencil sharpener
makes us easier to move things from one place to another
a simple machine consisting of a wheel that turns around a post called an axel
Lever
Formula of lever : (W x wa = F x fa) and (W:F = fa:wa)
examples of lever: seesaw, tweezers, crowbars
there are 1st class lever, 2nd class lever, and 3rd class lever
a rigid bar that rotates around a fixed point called a fulcrum
Subtopic
Pulley
examples of pulley: flagpole, blinds, elevators
its mechanical advantage is got by dividing its weight with force
there are three types of pulley : fixed pulley ( MA = 1 ), moving pulley ( MA = 2), and compound pulley (must be counted first
a simple machine made of a grooved wheel and rope or cable wrapped around it
