Simple Machines
MA=W/F
If the pulley is sideways, divide the W with
the amount of rope holding the wheel.
(The result is F)
If the pulley if vertical,you can count the amount
of rope.
Compound Pulley
a combination of fixed and a movable pulleys forms a block and tackle
Moving Pulley
MA=2
has an axle in a movable block
Fixed Pulley
MA=1
a fixed pulley has an axle mounted in bearing attached To a supporting structure. Change the direction of the force on a rope or belt that moves along its circumference.
Instead of using the smooth side of the inclined plane to make work easier
Axes
Knife
Inclined plane
F X l = W X h
- Inclined plane known as a ramp, a flat supporting surface tilted at an angle with one end higher than the other.
- Used as an aid for raising or lowering a load
Slides
Stairs
When you wrap an inclined plane around a cylinder it’s sharp edge becomes another simple tool ; screw
Light Bulbs
Bottle Cap
Device that makes work easier by magnifying or changing the direction of the force.
Screw
Wedge
Inclined Plane
Pulley
Wheel and Axle
Lever
Formula
MA = 𝑊/𝐹=(𝐹.𝑎):(𝑊.𝑎)
W x w.a = F x f.a
Classes
3rd Class
Force is in the middle of fulcrum and weight, force and weight move at the same direction
2nd Class
Weight is in the middle of fulcrum and force, weight and force moved in the same direction
1st Class
Fulcrum is in the middle of weight and force, load and force moved in opposite direction
any tool that pries something loose
Seasaw
Scissors
Pliers
Wheel & Axle
makes work easier by moving objects across distances
Door Knob
Pencil Sharpener
