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    COMPETENCY-BASED QUESTIONS

                     1.  Ankita needs to lift a heavy box to put it on a high shelf. Which simple machine

                        should she use to make the task easier?
                     2.  Riya wants to carry a large bag of sand from one end of the garden to the other.

                        She has a wheelbarrow. What simple machines are working in the wheelbarrow?

                                                                CASE STUDY

                        Shivani and her classmates are learning about simple machines in school. One day,

                        they notice that the playground equipment at the local park, like swings, slides and
                        see-saws, all use simple machines. Shivani is curious to learn how they work.

                        How it works:

                           See-Saw (Lever): By applying force on one side, the other side moves upward,
                            making it easier to lift a person.

                           Slide (Inclined  Plane): Reduces  the  effort needed  to  climb  up,  providing  a
                            smoother way to descend.

                           Swing (Pulley): The pulley system allows the swings to move back and forth
                            easily with a small force on one end.

                      Based on the given case, answer the following questions:
                      1.  What simple machine is used in the see-saw?

                      2.  How does the slide use an inclined plane?

                      3.  What does the pulley system in the swings do?

                                                                                 Simple and Complex Machines
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