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SIMPLE MACHINES AND LEVERS - Coggle Diagram
SIMPLE MACHINES AND LEVERS
Mechanical advantage
Mechanical advantage is a measure of the force amplification achieved by using a machine or tool
output/ input
SIX types of simple machines
screw
pulley
wedge
inclined plane
wheel and alxe
lever
Principles of Moments
clockwise moment about a point equals the total anticlockwise moment about the same point.
Moment =force F x perpendicular distance from the pivot d.
Moment =force F x perpendicular distance from the pivot d.
F1
D1=F2
D2
lever
: a rigid bar resting on a pivot, used to move a heavy or firmly fixed load with one end when pressure is applied to the other.
Second class lever
the force is in the middle of the fulcrum and load
bottle opener
Wheelbarrow
Third class ever
the load is in the middle of fulcrum and force
tong
First class lever
the fulcrum is in the middle of the effort and the load.
see-saw
Scissor
by: zhaoyu