# CBSE Class 9 Physics Question Paper SA1 2011 (5)

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CBSE Physics Question Paper for Class 9 CBSE exams for CBSE Students. Based on CBSE and CCE guidelines. The students should practice these Question Papers to gain perfection which will help him to get more marks in CBSE examination. Please refer to more CBSE Class 9 question papers in other links. The CBSE Question papers are of past examinations. Its always recommended by CBSE to practice the papers released by CBSE to get better exams in CBSE exams. CBSE Last Year Question Papers for class IX for final/ term/ SA1/ SA2 Examinations conducted by Central Board of Secondary Education for all CBSE affiliated schools in India and abroad.

SUMMATIVE ASSESSMENT –I (2011)

SCIENCE- SC1 QP 470022

Class – IX (Physics)

General Instructions:

(i) The question paper comprises of two sections, A and B. You are to attempt both the sections.

(ii) All questions are compulsory.

(iii) There is no overall choice. However, internal choice has been provided in all the five questions of five marks category. Only one option in such questions is to be attempted.

(iv) All questions of section A and all questions of section B are to be attempted separately.

(v) Questions 1 to 3 in section A are one mark questions. These are to be answered in one word or in one sentence.

(vi) Questions 4 to 7 in section A are two marks questions. These are to be answered in about 30 words each.

(vii) Questions 8 to 19 in section A are three marks questions. These are to be answered in about 50 words each.

(viii) Questions 20 to 24 in section A are five marks questions. These are to be answered in about 70 words each.

(ix) Questions 25 to 42 in section B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.

Section- A

1. An unbalanced force is acting on an object. List the possible effects that will be caused in the motion of object.

2. Write the S.I. unit of G. Why is gravitational constant (G) known as universal constant ?

3. An object is moving with uniform speed in a circle of radius r. Calculate the distance and displacement :

(a) When it complete half the circle

(b) When it completes full circle

(c) What type of motion does the object possess ? (Justify your answer)

4. What happens when we accidentally step on a peel of banana ? Explain with reference to Newton’s law of motion.

5. Give three points of differences between mass and weight.

6.(a) State the unit of force and define it.

(b) A stone is dropped from the edge of a 4.9 m high roof. Find out the following :

(i) Time taken to fall 4.9m ?

(ii) Velocity just before it reaches the ground.

(iii) What is its acceleration after 1 s and 2 s from start ?

7. (a) State Universal law of Gravitation.

(b) If the moon attracts the earth, why does the earth not move towards the moon ?

8. (a) Derive an expression to prove the law of conservation of momentum.

(b) Why does a karate expert suddenly reduce the speed of his hand while striking a slab of ice ? Explain with reference to Newton’s law of motion.

9. (a) State Newton’s first law of motion.

(b) A scooter is moving with an initial velocity of 90km/hr and it takes 10s to stop it, after the brakes are applied. Calculate the force exerted by the brakes on the scooter if its mass along with the rider is 200 kg. What would be the force if the mass is halved ?

Please refer to attached file for CBSE Class 9 Phycis Question Paper SA1 2011 (5)

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