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9th CBSE
IMPORTANT
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The inertia of an object tends to cause the object

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Important Questions on Force and Laws of Motion

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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 2
A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 3
The resultant force acting on a body is zero, then a
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 4
Two objects of masses 1 kg and 2 kg are moving with velocities 2 m s-1 and 4 m s-1, respectively. They collide and after collision the first object moves at a velocity 3 m s-1, then velocity of second object is
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 5
Jet planes and rockets work on the principle of conservation of
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 6
In the following question, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as
Assertion: Rate of change of momentum of body is equal to resultant force applied on the body.
Reason: Change in momentum is equal to impulse.
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 7
In the following question, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as
Assertion: Does Newton’s third law of motion apply to a system where bodies do not actually touch each other?
Reason: Action and reaction forces act on only first body.
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 8
In the following question, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as
Assertion: Rocket moves on the principle of conservation of energy.
Reason: Conservation of momentum is not applicable for motion of rocket.
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9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 9 - Force and Laws of Motion>CHAPTER EXERCISE>Q 9
Two similar vehicles are moving with the same velocity on the road such that one of them is loaded and the other one is empty. Which of the two vehicles will require larger force to stop it? Give reasons.