Question |
Answer |
A lever is |
is a simple machine that uses a fulcrum to create movement |
A wedge is |
2 inclined planes |
A pulley is |
a rope and circular plane |
An axle is |
a pole which enables a wheel to turn |
A wheel is |
a circular plane |
An inclined plane is |
a surface on a horizontal angle |
A screw is |
an inclined plane wrapped around a pole |
The fulcrum is |
the point where a lever changes force |
The effort is |
the force used to cause movement |
The load is |
what is being moved |
A first class lever has |
the fulcrum in the middle of the load and effort |
A second class lever has |
the load is in the middle of the fulcrum and effort |
A third class lever has |
the effort is in the middle of the load and fulcrum |
Mechanical advantage is when |
you divide the load by the effort |
Force multipliers |
multiply your effort making it easier to move a heavy load with less effort |
speed multipliers are |
third class levers which move small amounts quickly ie tennis racquet |
A wedge is used to |
split 2 objects or stop movement |
A screw is used to |
hold things together |
A ramp is used to |
move objects with less effort to a higher location |
A pulley is used to |
lift heavy loads by changing direction of the effort |
The more pulleys you have |
the easier it is to lift heavy weights |
A wheelbarrow is |
a second class lever |
A see saw is |
a first class lever |
Tweezers are |
a third class lever |
The six simple machines are |
lever, screw, inclined plane, wheel & axle, pulley and wedge. |
A complex machine is |
made up of 2 or more simple machines working together |