You can find multiple-choice questions (MCQs) for Class 9 Science Chapter 8 Force and Laws of Motion with answers below. These MCQs are specifically designed for students studying in Class 9 and follow the CBSE board curriculum. They align with the latest syllabus provided for Class 9 science. By attempting these MCQs, students can efficiently revise the concepts discussed in the chapter and effectively prepare for their Class 9 Annual examinations.
Previously –Â Motion Class 9 Science MCQ
Force and Laws of Motion Class 9 Science MCQ
Q.1. What is the overall effect of balanced forces on an object?
a) The object remains at rest
b) The object accelerates
c) The object decelerates
d) The object moves in a straight line
Answer
Q.2. According to the first law of motion, an object will continue to stay at rest or move at a constant velocity unless acted upon by what?
a) Unbalanced forces
b) Balanced forces
c) Frictional forces
d) Gravitational forces
Answer
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Q.3. Inertia is the tendency of an object to resist changes in its:
a) Direction
b) Velocity
c) Acceleration
d) All of the above
Answer
Q.4. According to the second law of motion, the acceleration of an object is directly proportional to what?
a) Its mass
b) Its inertia
c) The applied force
d) None of the above
Answer
Q.5. The mathematical formulation of the second law of motion is given by:
a) F = m × a
b) F = m / a
c) F = m + a
d) F = m – a
Answer
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Q.6. According to the third law of motion, every action has an equal and opposite reaction. What does this mean?
a) The reaction force is always equal in magnitude
b) The action and reaction forces act on different objects
c) The reaction force always acts in the opposite direction
d) All of the above
Answer
Q.7. A person pushes a wall with a force of 500 N. What is the reaction force applied by the wall?
a) 500 N
b) 0 N
c) It depends on the mass of the wall
d) None of the above
Answer
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Q.8. Which of the following forces is an example of an unbalanced force?
a) A book resting on a table
b) A car moving at a constant speed on a straight road
c) A ball falling freely towards the ground
d) A person pushing a heavy box
Answer
Q.9. Which of the following is an example of Newtons first law of motion?
a) A ball rolling down a hill
b) A book sliding on a table coming to a stop
c) A person riding a bike at a constant speed
d) A car accelerating after being at rest
Answer
Q. 10. If a force of 10 N is applied to an object with a mass of 2 kg, what will be the acceleration of the object?
a) 20 m/s^2
b) 5 m/s^2
c) 2 m/s^2
d) 0.2 m/s^2
Answer
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