A machine reduces the force needed but increases the time required.
True
False
A pulley helps to move heavier weight to a height.
Wells and flagpoles are examples of fixed pulley.
Screws can be used to lift heavy weights.
In class three levers, the fulcrum is in between the effort and the load.
A machine the time needed to complete a task.
increases
reduces
does not affect
Placing the near the load reduces the effort needed to move it.
object
fulcrum
force
In class levers, the load is in between the fulcrum and the effort.
one
two
three
A is an inclined plane wrapped around a rod spirally.
screw
wedge
pulley
Examples of pulley are cranes and ropeways.
fixed
inclined
movable
