Class 9 Science MCQ Chapter 9 Force and Laws of Motion, Class 9 Science MCQ Question Answer, Class 9 Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Science Class 9 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 9 Science MCQ Chapter 9 Force and Laws of Motion Question Answer can be of great value to excel in the examination.
SCERT Class 9 Science MCQ Chapter 9 Force and Laws of Motion
SCERT Class 9 Science MCQ Chapter 9 Force and Laws of Motion Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 9 Science MCQ Chapter 9 Force and Laws of Motion provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.
Force and Laws of Motion
Chapter – 9
Multiple Choice Questions & Answers
1. An object gains motion by –
(a) gravitation
(b) momentum
(c) balanced force
(d) unbalanced force
Ans: (d) unbalanced force.
2. A fan is moving on. Switch off the fan but the fan is moving continue for sometimes, what is the reason?
(a) momentum
(b) unbalanced force
(c) inertia
(d) balanced force
Ans: (c) inertia.
3. Amoving car is braked suddenly, the passengers bend infrared. What is the reason –
(a) inertia
(b) for momentum conservation
(c) momentum
(d) unbalanced force
Ans: (a) inertia.
4. Two force acting on a wooden block. But the block has no moved. Then the force is –
(a) unbalanced force
(b) balanced force
(c) force is equal to zero
(d) for inertia
Ans: (b) balanced force.
5. All planets must orbit the sun. It was firstly provided by –
(a) Newton
(b) Kepler
(c) Galileo Galili
(d) copernicus
Ans: (c) Galileo Galili.
6. From observation of Galileo Galili, four small bodies orbiting –
(a) Jupiter
(b) earth
(c) moon
(d) sun
Ans: (a) Jupiter.
7. Safety belts are worn to prevent –
(a) collision
(b) speed
(c) save driver
(d) accident
Ans: (d) accident.
8. An object is the mass of 10 kilogram. The inertia of the object is –
(a) 20kg
(b) 10kg
(c) 5kg
(d) 15kg
Ans: (b) 10kg.
9. An objects is mass of 10kg. It moves with 10ms¹ velocity. Then the momentum is –
(a) 100 mkg⁻¹
(b) 20kgms⁻¹
(c) Okgms⁻¹
(d) Imkg⁻¹
Ans: (a) 100 mkg⁻¹
10. An object is mass of 10kg. It moves with 10ms⁻² accelerated. Then the force is –
(a) 100 Newton
(b) 20 Newton
(c) 0 Newton
(d) 1 Newton
Ans: (a) 100 Newton.
11. What is the S. I. unit of momentum?
(a) Kgms⁻²
(b) Kgms⁻¹
(c) Kgms
(d) Kgms²
Ans: (b) Kgms-¹.
12. What is the value of In?
(a) 1kg * 1 ns⁻¹
(b) 1kg x 1ms⁻²
(c) 1kg x 1 n X
(d) 1kg × 1m⁻¹
Ans: (b) 1kgx1ms-²
13. One of the law of motion is called law of inertia. Which is it?
(a) 1st law of motion
(b) 2nd law of motion
(c) 3rd law of motion
(d) All of the above
Ans: (a) 1st law of motion.
14. As the Sailor jumps is forward direction the boat moves backward. It is the example of Newton, s
(a) 1st law of motion
(b) 2nd law motion
(c) third law motion
(d) inertia
Ans: (c) third law motion.
15. If (mAuA + mB + uB) is the total momentum of the two balls A and B at before the collision and (mAvA + mBvB) is the total momentum after the cellusion.
Then which is correct in the following.
(a) mAuB = mAvA X mBvB
(b) mAuA-mBuB = mAvA-mBvB
mAuA mAvA
(c) ———— = ————
mBuB. mBvB
(d) mAuA + mBmB = mAvA + mBvB
Ans: (d) mAuA + mBmB = mAvA + mBvB .
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