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Levers/Pulleys Test

TermDefinition
effort A force needed to move a load or overcome resistance.
N The symbol for newton.
away from To make the effort easier, move the effort _________ ______ the fulcrum.
close to To make the effort easier, move the load _______ _____ the fulcrum.
class 1 Levers that have the fulcrum in between the effort and the load.
class 3 Levers that have the effort in between the fulcrum and the load.
class 2 Levers that have the load in between the fulcrum and the effort.
3 The number of ways that a lever can be set up.
newton The unit used to measure effort.
spring scale An instrument used to measure force.
advantage A benefit obtained by using any simple machine.
directional advantage A change in direction that results from passing a rope through a pulley.
mechanical advantage The reduction in effort needed to lift a load or overcome resistance.
single fixed pulley ________ ____________ __________ change the direction of the effort.
single movable pulley _________ ____________ ___________ reduce the effort needed to lift the load.
6 The number of simple machines.
less The greater number of ropes supporting a load, the __________ effort needed to lift the load.
number of ropes supporting the load The effort needed to lift a load can be predicted from the weight of the load and the ....................
balanced by the cost The benefits gained by using a simple machine are always ..........
a useful tool When the benefits outweigh the costs, the machine is .............
lever A wheel and axle is a rotating version of what?
axle What is the rod around which wheels rotate?
screw An inclined plane spiraled around an axis.
an inclined plane makes work require less effort Name the true statement: -An inclined plane reduces the amount of work. -An inclined plane increases the amount of work. -An inclined plane makes work require less effort.
wedge A double inclined plane that tapers to a point or sharp edges.
Created by: AnneD