Science Test Wednesday February 8
Please make sure you study:
 -how MA is affected by the movement of the fulcrum
-the four fundamental forces of nature (i.e. gravitational, electromagnetic, strong nuclear, weak nuclear)
- understand vocab (e.g. simple machine, system, component)
-calculate MA p.
-calculate W=fd *ensure all distances appear in metres*
-calculate efficiency in percent-  output work/ input work x 100
-describe with examples, all 3 classes of levers