did the romans or the greeks or the egiptians
Pulleys cannot effect society, effect is not a verb you bozo.
Rope and pulley.
A Pulley is basically a kind of lever that can be used to change the direction of a force. Properly used, a pulley or system of pulleys can multiply forces
A Pulley is basically a kind of lever that can be used to change the direction of a force. Properly used, a pulley or system of pulleys can multiply forces
I used a pulley to lift the large log.
A pulley system with a rope or cable is typically used to raise a flag up a flagpole. The pulley helps to lift the flag efficiently and can be manually operated or automated for larger flagpoles.
The blinds use a pulley (fixed pulley).
elevators
Snub pulleys are used to increase the angle of wrap of the driver pulley or and to change the direction of belt(deflector pulley)
A pulley is used to move a heavy weight. You can use a pulley to lift something that you can't lift alone.
pulley an belt are used in driving camshaft,alternator,water pump,air pump, compressor in a car.
To ease the raising of sails, a pulley is attached to the top of the mast.