Answers

2015-08-03T22:08:37+05:30
It means that collect pictures of muscular force,frictional force and pastw it on a scrap book.U can buy scrap book from the stationary shop
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2015-08-04T09:22:14+05:30
As he said is wrong ,your teacher told you to get those from different sources .So you must not buy it,you must do it as your teacher said

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