Puzzles Class 9 Motion

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Class 9 Motion Puzzles

Class 9 Motion Puzzles

1. What is the unit of speed in the SI system?

  • a) metre
  • b) metre per second
  • c) kilometer
  • d) kilometer per hour
Hint: Speed is defined as distance traveled per unit of time.
Answer: b) metre per second

2. What is the term for motion along a straight line?

  • a) Circular motion
  • b) Linear motion
  • c) Non-uniform motion
  • d) Uniform motion
Hint: This type of motion occurs when an object moves along a straight path.
Answer: b) Linear motion

3. Which law states that an object will remain at rest or in uniform motion unless acted upon by an external force?

  • a) Newton's First Law
  • b) Newton's Second Law
  • c) Newton's Third Law
  • d) Newton's Law of Universal Gravitation
Hint: This law is also known as the law of inertia.
Answer: a) Newton's First Law

4. What is the velocity of an object that covers 100 meters in 10 seconds?

  • a) 10 m/s
  • b) 50 m/s
  • c) 100 m/s
  • d) 5 m/s
Hint: Velocity is equal to distance divided by time.
Answer: a) 10 m/s

5. What type of motion occurs when an object moves in a circular path?

  • a) Linear motion
  • b) Circular motion
  • c) Rotational motion
  • d) Vibrational motion
Hint: This motion occurs in objects moving around a central point.
Answer: b) Circular motion

6. The formula for acceleration is:

  • a) (Final velocity - Initial velocity) / Time
  • b) (Initial velocity - Final velocity) / Time
  • c) Distance / Time
  • d) Speed / Time
Hint: Acceleration is the change in velocity over time.
Answer: a) (Final velocity - Initial velocity) / Time

7. What type of motion involves an object moving at a constant speed?

  • a) Non-uniform motion
  • b) Uniform motion
  • c) Accelerated motion
  • d) Circular motion
Hint: The object covers equal distances in equal time intervals.
Answer: b) Uniform motion

8. What is the unit of acceleration in the SI system?

  • a) m/s
  • b) m/s²
  • c) km/h²
  • d) m²/s
Hint: Acceleration is the rate of change of velocity per unit time.
Answer: b) m/s²

9. According to Newton's second law of motion, force is equal to:

  • a) Mass times velocity
  • b) Mass times acceleration
  • c) Mass divided by acceleration
  • d) Velocity divided by time
Hint: Force is the product of mass and acceleration.
Answer: b) Mass times acceleration

10. What does Newton's third law of motion state?

  • a) For every action, there is an equal and opposite reaction.
  • b) An object at rest stays at rest unless acted upon.
  • c) Force is equal to mass times acceleration.
  • d) Motion is always in a straight line.
Hint: This law explains the reaction forces when you push something.
Answer: a) For every action, there is an equal and opposite reaction.

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