Force and Laws of Motion (Quiz- 1) in HINDI for Class 9 NCERT Science

In this Science (Physics) video in Hindi for Class 9 we solved 11 multiple choice questions from the chapter 'Force and Laws of Motion'. It is a topic from chapter 9 from NCERT.
We solved questions on basics of force, balanced and unbalanced forces, friction, Newton's first law of motion, inertia etc.
The questions are following
1. Which of the following are correct about force?
A) it is a pull or push
B) it is measured in newtons (N)
C) several of it can act together and be balanced or unbalanced
D) always change velocity of an object
2. A block sitting on a table has .....
A) acceleration ≠ 0 m/s2
B) A velocity = 0 m/s
C) unbalanced forces are acting on it
D) balanced forces are acting on it
3. Which one of the following is being acted upon by unbalanced forces?
A) a falling ball
B) a book resting on a table
C) a ball hanging by a rope
D) a car moving with a constant velocity
4. Which of the following are correct about friction?
A) it acts on the surface between two bodies
B) it reduces the motion of a moving body
C) it is auto adjusting
D) it has a maximum limit
5. Newton's first law of motion sometimes called the law of ......
A) unbalanced forces
B) balanced forces
C) inertia
D) force
6. Inertia can be measured by using .....
A) velocity
B) acceleration
C) mass
D) force
7. Which object has highest inertia?
A) a cricket ball
B) a man
C) A car
D) a bus
8. Who demonstrated first that no external force is required to keep a body in uniform motion in a straight line
A) Aristotle
B) Galileo Galilei
C) Isaac Newton
9. An object in motion stays in motion and an object at rest stays at rest until .....
A) an unbalanced force acts on it
B) a balanced force acts on it
C) objects in motion naturally come to rest
10. In order for a 3 kilogram block to maintain a velocity of 6 metre per second on a frictionless surface how much force must be applied?
A) 12 N
B) 9 N
C) 2 N
D) 0 N
11. A 3 𝑘𝑔 block is moving with a velocity of 6 m/s on a surface (friction is present). How much force must be applied to maintain its velocity?
A) 18 N
B) 2 N
C) 0 N
D) Force equal to the frictional force.
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🔴 Click here to watch the whole playlist on Chapter 9 : 'Force and Laws of Motion' for Class 9 :
• Force and Laws of Moti...
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🔴 Previous videos :-
Force and Laws of Motion - Introduction (Force - 1)
• Force and Laws of Moti...
Balanced and Unbalanced Forces (Force - 2)
• Balanced and Unbalance...
Friction (Force - 3)
• Friction (Force - 3) i...
Newton's First Law of Motion (Force - 4)
• Newton's First Law of ...