Wednesday, 7 November 2012

Machines Part 2
  • Some tools of devices use more than one simple machine, such as scissors.
  • A tool or device that has more than one simple machine is a complex machine.
  • Example :
Step Ladder - Inclined plane, Screw

Mechanical pencil sharpener - Wedge, wheel and axle
Puncher - Lever, wedge, screw

Scissors - Wedge, lever, screw   

  • By using the simple machine or complex machine, can help us to do a lot of work and easy.
  • Such as :
They use a pair of scissors to cut the paper to make the card .