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