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อธิบายความสําคัญของอุปกรณ์ช่วยผ่อนแรง - Coggle Diagram
อธิบายความสําคัญของอุปกรณ์ช่วยผ่อนแรง
Pulley
A wheel and rope that can change the direction of a force.
Examples
A flagpole
Lever
A plank that rest on something underneath and moves up and down.
Example
A seesaw
Simple Machines
Tools that make difficult tasks easier by changing the direction of the force
Inclined Plane
Example
Ramps
A simple machine that has gently sloped surface so it can be used to move objects upwards with less force
Wedge
A simple machine that gets thinner at one end that is used to split material such as wood
Example
A knife
Screw
An inclined plane wrapped around a center rod.
Example
spiral staircase
