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Pulleys

QuestionAnswer
What direction do you pull a single-fixed pulley? down
What direction do you pull a single-moveable pulley? up
What is a wheel that is attached to something above the load? fixed pulley
A wheel that is attached to the load is called a _________ ________. moveable pulley
This reduces the effort (force) needed to lift a load or overcome a resistance. mechanical advantage
This reduces the effort needed to lift a load or overcome a resistance. mechanical advantage
A change in direction of the effort that results from passing a rope through a pulley. directional advantage
A change in direction of the effort that results from passing a rope through a pulley. directional advantage
What type of pulleys change the direction of the effort? single fixed pulleys
These pulleys reduce the effort needed to lift a load. single moveable pulleys
These pulleys reduce the effort needed to lift a load. moveable pulleys
There are six of these. simple machines
In a ______________ _______________ , a reduction in effort is balanced by the distance over which the effort must act. lever system
________ pulleys can provide greater mechanical advantage than ____________ when lifting a load. two one
The _______________ number of ropes supporting a load, the less _____________ needed to lift the load. greater effort
The unit used to measure effort. newton
An instrument used to measure force is called a ____________ ___________. spring scale
What is a benefit obtained by using any simple machine? advantage
The effort needed to lift a load can be predicted from the weight of the load and what other thing? number of ropes supporting the load
The benefits gained by using a simple machine are always balanced by what? cost
A machine is a useful tool when the __________ outweigh the cost. benefits
Created by: AnneD