CBSE ADDA

JSUNIL TUTORIAL  PUNJABI COLONY GALI NO. 01 C.B.S.E.-2012-Sample-Papers-for-IX-Physics + Chemistry-Summative-Assessment-I                                       Physics (Section A) 1. Give an example of situation: one object with a constant acceleration but with a zero velocity.          1-marks 2. Define Inertia  2-marks 3. A motor boat starting from rest on a lake accelerates in a straight line at a constant rate of 3m/s2 for 8s. How far does the boat travel during this time?   2-marks 4. Differentiate between distance and displacement.                       3-marks 5. Drive the equation for Newton’s second law of motion.              3-marks 6. A stone of 1 kg is thrown with a velocity of 20 m/s across the frozen surface of a lake comes to rest after travelling a distance of 50m. What is the force of friction between the stone and the ice?                                                

CBSE Class IX Introduction to Euclid's geometry   In geometry, we take a point, a line and a plane as undefined terms. An axiom or a postulate is a mathematical statement which is assumed to be true without proof. These assumptions are actually obvious universal truths. We use the term postulate for the assumptions that were specific to geometry. Axioms, on the other hand are assumptions used throughout mathematics and not specifically linked to geometry. Theorems are statements which are proved, using definitions, axioms, previously proved statements and deductive reasoning. Some of the Euclid’s axioms are : (i) Things which are equal to same thing are equal to one another. (ii) If equals are added to equals, the wholes are equal. (iii) If equals are subtracted from equals, the remainders are equals. (iv) Things which coincide with one another are equal to one another.

Class IX Physics + Chemistry First Term Examination 2012-2013 General Instructions:- Time- 2 hrs        MM: 50 1. Question 1 to 10very short answer questions of 1 mark each 2. Question no 11 to 16 are short answer questions of 2 marks each 3. Question no 17 to 22 are also short answer question carrying 3marks each 4. Question no 23 and 24 are long answer question carrying 5 marks. 1. What is the name given to the material which makes everything in the universe, in and Around us? 2. What do you mean by the term ‘Pure substance’? 3. What does odometer of an automobile measure? 4. Which has more inertia - A bicycle or a train? 5. Define sublimation. 6. What is the nature of distance time graph for uniform motion of an object? 7. What is the acceleration of free fall? 8. Define acceleration? Give its units. 9. Zinc is present in the laboratory in the form of (a) fillings (b) granules(c

Question on  Class IX  »  Science  »  Gravitation  » The Universal Law Of Gravitation. Q.1. When we move from the poles to the equator. Hence, the value of ‘ g ’ decreases.  Why Ans: The shape of earth is an ellipse so when we move from the poles to the equator the radius of the earth R increases. Hence, the value of ‘   g   ’ decreases because value 'g' is inversely proportional to the radius of earth. g = GM/R 2 Q. 2. What is the diffrence between centrifugal force and centripetal force? Ans: Centripetal Force            (i) It is the force that keeps a body in circular path. (ii) It acts toward the center. Centrifugal Force (i) It is the pseudo force that tries to make a body fly off the circular path.  (ii) It acts outward the center. Q.3. Explain :Centrifugal force and Centripetal force? Ans: A force which is required to move a body uniformly in a circle is known a