Term | Definition |
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. |