Sunday, 28 October 2012

Machine Part 1

What is Machine ?
  • A machine is any tool or device that enables us to do work easily, quickly and conveniently.

  • Do you know what is the Machine is he use ? That is one of the complex machines.
  • Do you know how the complex machines made it ? They made of the simple machines.
  • A simple machine is a tool that allows us to use less force to do work.
  • These are seven types of simple machines, that are inclined planed, screw, gear, pulley, lever, wedge and wheel and axle.

Sunday, 14 October 2012

What is Force ?
  1. All actions involve pushes and pulls.
  2. Pushes and pulls are forces.
  3. A push is an action of moving an object away.
  4. A pull is an action of bringing an object towards us or in the direction we are moving.
  5. Expect activity of force :
  • The boy slides down because there is a force pulling him.
  • A man needs to pull the fishing rod to get the fish out of the water. 
  • The roundabout rotates when being pushed.
  • The girl on the swing moves forward and then upwards when given a push.
  • The girl shoot the ball because there is a force pulling the ball.