GOLDCREST HIGH, LATUR 2nd TERM END EXAMINATION (2018-19) GRADE: 9 SUBJECT: SCIENCE PAPER-1 (PHYSICS) Time: 2 Hours Max. Marks: 80 Answer to this question must be written on the paper provided separately. You will not be allowed to write answers for the first 15 minutes. This time is to be spent on reading the question paper. The time given at the head of this paper is the time allotted for the writing the answer. The paper is divided into two sections. Attempt all questions from Section A and any four questions from Section B. The intended marks for questions or parts of questions are given in brackets [ ] SECTION-I (40 Marks) (Attempt all questions from this Section) Question-1 (a) (i) Define the least count of an instrument. (ii) What is the least count of a standard laboratory micrometer screw gauge?  (b) A spring balance is used to find the weight of a body X on the surface of the moon. The mass of the body X is 2 kg and its weight is recorded as 3.4 N. The weight of another body Y recorded by the same balance is found to be 7.65 N. Calculate the mass of the body Y.  (c) State two differences between mass and weight.  (d) Two pendulums P and Q have equal lengths but their bobs weigh 10 gf and 20 gf respectively. (i) Compare their time periods. (ii) Give a reason for your answer. (e) Why do we need to run a certain distance before getting into a moving bus?   Question-2 (a) Copy the diagram below and clearly mark the directions of the forces that act on it and name the forces.  (b) If I travel from Mumbai to Pune (150 Km) in 2 hrs via the Express Highway and return to Mumbai via the old High way (180 km) in 3 hrs, calculate the average velocity during the entire journey.  (c) Define retardation and give an example of a body having this motion. TEE-2/PHY/2018-19/KSH This question paper consists of 5 printed pages and 1 blank page  Page 1
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