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# ICSE Class X Mid-term 2023 : Physics : Second Formative Assessment

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N. L. Dalmia High School (4Sehool of Bxeclone of V L. Dalmia Edueatiel Soeiety) 1CSE -ISC ISO 9O01:2015 SECOND FORMATIVE ASSESSMENT PHYSICs Class: X SESSIONII Date: 18.07.2022 Marks:40 / Pgs 2 Time: 1 hr Answer to this paper must be written on the paper provided separately. You will not be allowed to write in the first 1Ominutes. This time is tobe spent in reading the question paper. The time given at the head of this paper is the time allowed for writing the answers The intended marks for questions or for parts of questions are given in brackets [) SECTION A (Attempt all questions) Question 1 Two bodies,Aand Bof equal mass are kept at heights 20 mand 30 mrespectively. (21 Calculate the ratio of their potential energies 2. When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where [21 [21 does it get its kinetic energy? 3. Abody falls freely under gravity from rest. Name the kind of energy it willpossess a) At the point from where it falls b) While falling 4. Where does the position of centre of gravity lie for a) a circular lamina 5. [21 (b) a triangular lamina Aman can open a nut by applying a force of 150 N by using a handle of length 0.4 m. What should be the length of the handle if he is able to open it by applying a force of 60N? [21 Question 2 1. Abody of mass 5kg is moving with a velocity of 10 ms, What will be the ratio of its initial kineticenergy and final kinetic energy, if the mass of the body is doubled and its [21 velocity is halved? 2. Abody is acted upon bya force. State two conditions under which the work done could be zero. [21 3. (a) Define one Joule. (b) Write the relation between S.l. unit and C.G.S. unit of Work. 4. (a) What is meant by the term 'moment of force'? [21 (b) If the moment of force is assigned a negative sign then wil the turning tendency of the force be clockwise or anticlockwise? [21 Contd.. Pg 2

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