2.  A machine is an instrument that multiplies force to make work faster and easier. We can classify machines into two groups, depending on faster complexity: Simple machines and complex machines.

3.  Simple machines have usually got one or two parts. The inclined plane, the pulley and the levers are simple machines.

4.  Ramps are inclined panes that we us to go up and down. We can also use inclined planes to move heavy loads more easily.  This is a ramp. This is a ramp of a burgonet.

5.  A pulley is a wheel with an axle in the centre and a rope that runs around the outside. We use a pulley to change the direction of a force that we are applying.

6. AA lever consists of a rigid bar called the fulcrum. There are three elements: The effort. The resistance. The fulcrum. This is an example of at the levers.

7. EEffort is the force placed on the simple machine to move the load. Also called applied force or input force. The effort.

8.  The resistance is the force which an effort force must overcome in order to do work on an object a simple machines. Resistance force, like most other forces, is measured in newtongs or in pounds-force. The resistance.

9.  There is a rigid bar that turns on a fixed point. The fulcrum.

10. TThe lever is a simple machine consisting of a rigid bar that is free to pivot on a fulcrum. DDepending on the position of the force (F), the load or resistance (R) and the fulcrum, there are : Class 1 lever. Class 2 lever. Class 3 lever.

12.  What is a machine?  A machine is an instrument that multiplies force to make work faster and easier.  Simple machines have usally got…  One or two parts.  One example of inclined planes.  Ramps.

13.  What is a pulley?  A pulley is a wheel with an axel n the centre and a rope that runs around the outside.  What are the parts of the levers?  The parts of the levers are the effort, the resistance and the fulcrum.  How many class of levers there are?  There are 3 class.

14.  What are there?  There are class 1 lever, class 2 lever, class 3 lever.  What is the effort?  The effort is the force placed on simples machines.  What is the resistance?  The resistance is the force which an effort force.

15.  What is the fulcrum?  The fulcrum is a rigid bar that turns on a fixed point.

16. By: Lucia Haba Niso. Course:5ºA. School: C. P. Pio Baroja.