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18 terms

5th grade simple machines

STUDY
PLAY
axle
a pole which is connected to the centerof a wheel
compound machine
a machine made up of more then 1 simple machine
force
a push or a pull causing objectst ostop, start, slow down, speed up, change direction or change shape
fulcrum
the part of a lever that doesn't move
gear
toothe wheel
inclined plane
a sloping surface, or ramp used to help move things to higher or lower places
lever
a simple machine with 2 main parts: a fulcrum and an arm which moves on the fulcrum
load
anything that we want to move (resistance)
machines
devices which help us to do work wit hreduced effort
pully
a simple machine made up of a grooved wheel with a rope, belt or chain around it
fixed pully
a pully which changes the diection of the effort
movable pully
a pully which moves up or down with the load
ramp
a slopping surface or inclined plane, used to help lift or lower objectes
screw
a simple machine made up of 2 main parts: a stright shaft and a sloping surface wrapped around in a spiral
simple machines
wheel and axil, pully, inclined plane, wedge, lever and screw
wedge
a simple machine with 2 surfaces which came together at one point, making a thin and a thick end; 2 inclined planes back to back
wheel
a simple machine used to roll a load easily along a surface
work
we do work whenever we use force to move something (amount of work=effort x distance)