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                      In the pulley activity, when you pull one side of the rope, the pulley helps
                      to lift an object up. The pulley makes it easier to lift heavy things. You will

                      notice that the object goes up as you pull the rope down.

                      Concepts

                         • How a Pulley Works: The concept of pulley can be understood by using

                         the rope and wheel to lift up the heavy object. It makes lifting objects

                         easier by changing the direction of the force. When the rope is pulled
                         down the objects get lifted up.

                         • Effort and Lifting: By using a pulley, it’s easier to lift heavy objects

                         because the pulley reduces the efforts needed to lift something.

                      Observations

                      In the pulley activity, students will see how pulling the rope down lifts the
                      object up. They will observe that it feels easier to lift something heavy with

                      a pulley than by using just their hands. This helps students understand
                      how  pulleys  make  hard  jobs  easier  and  why  pulleys  are  used  in  many

                      real-world situations, like in cranes or flagpoles.

                      What is Complex Machine?

                      A complex machine  is a  tool  made

                      up  of  many  simple  machines
                      working  together  to  do  a  big  job.

                      Simple machines like levers, pulleys,
                      or  wheels are  combined  to  make

                      complex machines work.

                      Example of a Complex Machine

                      The example of a complex machine
                      is:

                           22    RoboGenius (V1.0)-II

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