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.
What is Force ?
- All actions involve pushes and pulls.
- Pushes and pulls are forces.
- A push is an action of moving an object away.
- A pull is an action of bringing an object towards us or in the direction we are moving.
- 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.
