Help to study levers and 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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| SF/SM down has how many supporting ropes? | 2
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| SF/SM down is how many times easier to lift the load? | 2
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| SF/SM up has how many supporting ropes? | 3
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| SF/SM up is how many times easier to lift? | 3
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| Diagram-a _______ that describes the ________ of all the parts of a system | drawing realationship
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| A ________ uses a system of symbols and conventions to communicate information about lever design | diagram
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| Class 1 levers have the ____ in the middle and the load and effort at the ends. | fulcrum
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| Class 2 levers have the _____ in the middle and the fulcrum and the effort at the ends. | load
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| Class 3 levers have the _____ in the middle and the fulcrum and the load at the ends. | effort
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| Levers can be set up in _ basic ways. Class 1 Class 2 Class 3 | 3
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| The F,L, and E stand for the part of the lever system that is in the _________ of the lever. | middle
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| When using the spring scale to measure effort needed with the lever, you must add _____________ to your reading, because the ____ of the spring scale is already exerting 0.5 newtons on the lever. | 0.5 newtons weight
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| The _______ needeed to lift the load decreases as the load gets _______ to the fulcrum: the effort ________ as the load gets farther from the _________. | effort, closer, increases,fulcrum
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| Two- coordinate graphs show ___________ between two variables and can be used to make ____________ | relationships, predictions
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| Advantage is a __________ obtained by using a lever (or other simple machine.) | benefit
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| The __________ the effort is from the fulcrum, the easier it is to lift the load. | farther
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| The ______ of the load remains the ____, but the effort needed to lift it varies depending on ______ the effort is applieid on the lever arm | weight, same, where
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| A lever can make load ______ to lift, it can ___ loads, and it _______ the effort | easier, move, reduces
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| In a lever system the farther from the ______ the effort is applied, the _______ the advantage is to the lever user. | fulcrum, greater
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| Effort- the _______ needed to move a ____ or overcome a __________. | force, load, resistance
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| Effort is measured in ________. (N) | newtons
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| Lever- a _____ __________ that people use to gain a _________ ___________, such as making work _______. | simple machine, mechanical advantage, easier
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| lever arm- a stick or beam free to ________ at a point. | pivot
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| ___________- the point where the lever arm pivots | fulcrum
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| load- the _____ lifted or the __________ overcome by a lever. | mass, resistance
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| Single fixed has how many supporting ropes? | 1
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| Single fixed is how many times easier to lift? | 1
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| Single movable has how many supporting ropes? | 2
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| Single movable is how many times easier to lift? | 2
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| A pulley is a wheel with a grooved rim in which a rope can run to change the _______ of the pull (force) that lifts a load | direction
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| A fixed pulley has a wheel that is attached to something _______. | above the load
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| A movable pulley has a wheel that is attached to __________. | the load
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| Mechanical advantage reduces the _____ (force) needed to lift a load or overcome a resistance' it results from using a simple machine | effort
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| Directional advantage is a change in _________ that results from passing a rope through a pulley | direction
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| A single pulley can be set up as a ___________ pulley or a __________ pulley to lift a load. | fixed, movable
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| Single fixed pulley changes the __________ of the effort | direction
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| Single movable pulley reduces the _______ need to lift the load | effort
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| Simple machine- any of the ___ basic devices that provide ___________ or other advantage, such as pulleys and levers | six,mechanical
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| two pulleys can provide greater ______________ advantage than one when lifting loads | mechanical
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| what are the six basic machines? | lever, pulley, wheel and axel, inclined plane, wedge, screw
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| The benefits gained by using simple machines are always balanced by ________. When the benefits outweigh the cost, the machine is a __________ tool. | costs, useful
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| In a lever system and a pulley system, a reduction in effort is balanced by the __________ over which the effort must act. | distance
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| **Work= Force x ________** | Distance
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| Work is measured in_______. (J) | Joules
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Created by:
dkt101
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