pulleys wheels and axles, gears Flashcards
1
Q
whats a pulley?
A
a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.
2
Q
how many pulleys are there and what are they?
A
4, single fixed pulley, single moveable pully, double fixed pulley, and multiple fixed pulley.
3
Q
what is the single fixed pulley?
A
changes the direction of a force
4
Q
what is the single moveable pulley?
A
half the load is supported by the rope
