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ICSE Prelims 2015 : Physics (The Ashram, Chennai)

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S Sudha
The Ashram, Chennai

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PHYSICS SCIENCE Paper - 1 (Two hours) Answers o this Paper muss be written on the paper provided separately. You will not be allowed o write during 11w first 5 minutes. This time is to be spent in reading the Question Paper. The time given al the head of this Paper is the time allowed for writing the answers. Section is compulsory. Attempt any four questions from Section Ii The intended marks for questions or parts of questions are given in brackets (j. SECTION 1(40 Marks) Attempt ail questions from this Section. Question 1 (a) A force is applied on (1) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in. the aboue two cases2 L2) (b) Where does the position of ce nl re of gravity tie for (i) a circular lamina (ii) a triangular lamina 121 (c) (j) On what factor does the position of the centre of gravity of a body depend? (ii) What is the S.1.unit of the moment of force? (2] . . - . . tJ (d) (t) What is meant by the term moment of force T (ft) If the moment of force is assigned a negative sign then will the turning tendency of the /brce be clockwise or anticlockwise? f 2J (e) A type of single pulley is very often used as a machine even though it does not give any gain in mechanical advantage. (j) Name the type of pulley used. (ii) For what purpose is such a pulley used? [2] Question 2

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