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Preliminary Examination 2021 PHYSICS Grade :X Maximum Marks: 80 Date: 2/02/2021 Time: 2 hours Instructions Answer to this paper should be written in separate answer sheets provided to you. You have two hours to answer this paper excluding the reading time. You will be given first 15 minutes as reading time. You are not supposed to write during these 15 minutes. All questions are compulsory in Section A (40 marks). Each question carries 10 marks. Marks allotted to each question is mentioned against it. In Section B (40 marks) you need to attempt ANY FOUR questions of your choice. Each question carries 10 marks. This paper consists of 6 printed pages. __________________________________________________________________ Section A (Answer all questions) Question 1 (i)Redraw the diagram given below and mark the point of application and the direction of force to turn it anticlockwise. [2] r r (ii) Page 1 of 6 If the radius of wheel is r then what will be the moment of force? Is it vector or scalar? [2]
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