Page 1 - Home Assignment
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SAI INTERNATIONAL SCHOOL
                                                          Class8
                                                  Home Assignment
                                                   Subject-Physics
                                                       CH-Friction
                                       Subtopic-Friction, a necessary evil


                       INSTRUCTIONS:
                     For Assertion& Reason question follow the following directions.
                       DIRECTION: Each of these questions contains an Assertion followed by Reason. Read them
                       carefully and answer the question on the basis of following options. You have to select the one
                       that best describes the two statements.
                       (a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
                       (b) If both Assertion and Reason are correct, but Reason is not the correct explanation of
                       Assertion.
                       (c) If Assertion is correct but Reason is incorrect.
                       (d) If Assertion is incorrect but Reason is correct.
                       (e) If Assertion & Reason both are incorrect.
                       1  Assertion: Friction is a necessary evil.                                             1
                           Reason: Lubricants decrease friction.
               Fill in the blanks
                   2       Friction produces __________.                                                       1
               True/ False
                       3  Friction is never a necessity it is always a disadvantage.                           1
               Subjective question
                       4  Give two examples to show that friction is both friend and a foe                     2
                       5  List three disadvantages of friction?                                                3
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