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A pulley is a simple machine capable of lifting weights.
It consists of a wheel that can rotate about an axle passing through its centre, with a groove (also
called a throat) along its outer edge for holding a rope.
PULLEYS
A pulley is a machine that can be used to lift a weight by applying effort in the easier direction, i.e. from
top to bottom, therefore making the work easier.
Mechanically neutral
fixed pulley!
Mechanically
advantaged moveable
pulley!
Example: with a fixed pulley, lifting a weight of 10
kilogrammes (symbol kg - or more accurately, 10
kilogramme-force for all you scientists, symbol:
kgf), will require a force of 10 kg.
Assembled base
42
Assemble a crane with a fixed pulley
Содержание Science & Play TechnoLogic Mechanics Laboratory 75025
Страница 12: ...12 2 4 3 X1 X1 X2 X4 X4 X8 X4 X2 X2 X1 Assembled motor...
Страница 13: ...13 5 90 6 90 1 1 3 1 1 5 3 5 41 10 X1 X1 X1 X2 X3 X4 X3 X2 X1 X3 X2 X1 X1 X1 X1 3 5 41 10...
Страница 16: ...16 10 11 12 3 3 1 1 3 X4 X7 X2 X1 X1 X2 X4 X8 X8 X2 X3 X2 X2 X2 X4 3 Top of the assembled crane...
Страница 19: ...19 1 1 1 2 3 3 3 X6 X1 X2 3 X2 X1 X4 X2 X4 X4 Assembled base 46 In the gym with a barbell...
Страница 20: ...20 3 4 5 1 1 2 2 3 3 1 1 6 6 1 1 3 X6 X2 X1 2 3 X10 X1 X1 6 X1 X1 X1 Final assembled model...
Страница 28: ...28 3 4 1 1 4 4 18 X6 X1 X2 X1 X2 X2 X2 X1 X1 4 18 Front...
Страница 29: ...29 5 6 1 1 3 3 3 X1 X1 X1 X1 X3 X1 X1 X2 X2 3 X1 X1 X1 X1 X1 X1 X2 Front components...
Страница 31: ...31 9 1 1 4 4 41 X4 X1 X1 X1 X4 X2 X1 4 41 Assembled helicopter rotor and blades...
