Page 1 - Competency Based Worksheet- Friction
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SAI INTERNATIONAL SCHOOL


                                                     Class 8

                                   Competency Based Worksheet
                                             Subject- Physics

                                                Ch. – Friction


               1.    Least amount of friction is required in which of the following sports?
                        a) Car race
                        b) Football
                        c) Ice skating
                        d) Tug of war

               2.    The frictional force on an object in a fluid does not depend on its ________ with respect
                        to the fluid.
                        a) Mass
                        b) Shape
                        c) Speed
                        d) Both b & c

               3.    Increasing friction is necessary for which of the following?
                        a) Free wheel of a bicycle
                        b) Bicycle handlebar
                        c) Chain of the bicycle
                        d) Ball bearings in the front wheel

               4.    Which of the following is used in liquid form as a lubricant?
                        a) Oil
                        b) Graphite
                        c) Talcum powder
                        d) Sugar

           Picture-Based Questions
               5.    The picture shows two types of shoe soles.
                        a) Which shoe sole provides the best grip while
                        walking?
                        b) Explain the reason for your answer.










               6.    Look at the figure given below.
                        a) Which force is necessary for successfully
                        completing this activity?
                        b) The person is trying to move against ________.
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