Physics 9th Chap 1 Topic 9(Justify Vector Quantity)

Physics Chapter 1 (Topic 9 : Justify Vector Quantities)

Justify that displacement, force, weight, velocity, acceleration,
momentum, electric field strength and gravitational field
strength are vector quantities.

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Q1. Why is displacement considered a vector quantity?

A) It depends only on time

B) It has magnitude only

C) It has both magnitude and direction

D) It depends on mass

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Q2. Force is a vector quantity because it:

A) Has direction and magnitude

B) Has only magnitude

C) Depends only on mass

D) Has no unit

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Q3. Weight is classified as a vector quantity because it:

A) Has no magnitude

B) Always acts upward

C) Acts towards Earth’s center (directional)

D) Depends only on time

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Q4. Velocity differs from speed because velocity:

A) Has only magnitude

B) Has no unit

C) Has direction and magnitude

D) Is scalar

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Q5. Why is acceleration a vector quantity?

A) It has only magnitude

B) It depends on mass only

C) It involves change in velocity direction

D) It has no unit

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Q6. Momentum is a vector quantity because it depends on:

A) Mass only

B) Speed only

C) Velocity (direction included)

D) Time only

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Q7. Electric field strength is a vector quantity because it:

A) Has only magnitude

B) Has no direction

C) Has direction of force on a charge

D) Depends on temperature

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Q8. Gravitational field strength is a vector because it:

A) Has magnitude only

B) Acts in a specific direction (towards mass center)

C) Has no unit

D) Depends on speed

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Q9. Which of the following is NOT a vector quantity?

A) Force

B) Velocity

C) Mass

D) Acceleration

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Q10. What makes displacement different from distance?

A) Distance has direction

B) Displacement has no magnitude

C) Displacement includes direction

D) Both are vectors

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Q11. Which statement best describes weight?

A) Scalar because it depends on mass only

B) Vector because it has direction (towards Earth)

C) Scalar because it has no unit

D) Neither scalar nor vector

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Q12. Momentum direction is always along:

A) Force

B) Velocity

C) Acceleration

D) Time

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Q13. Which of the following is a vector in circular motion?

A) Speed

B) Distance

C) Velocity

D) Time

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Q14. Why is electric field strength considered a vector?

A) It has no direction

B) It acts randomly

C) It shows direction of force on a charge

D) It depends on mass

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Q15. Which quantity changes direction when motion changes?

A) Mass

B) Time

C) Velocity

D) Temperature

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Q16. Acceleration is a vector because it depends on:

A) Speed only

B) Change in velocity

C) Distance only

D) Mass only

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Q17. Which is true about gravitational field strength?

A) It has only magnitude

B) It acts away from Earth

C) It acts toward Earth’s center

D) It has no direction

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Q18. Which pair contains only vector quantities?

A) Mass, speed

B) Force, velocity

C) Time, energy

D) Temperature, distance

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Q19. Why is force a vector quantity?

A) It has no direction

B) It depends on time

C) It can act in different directions

D) It is always constant

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Q20. Which is NOT required to define a vector quantity?

A) Magnitude

B) Direction

C) Unit

D) Emotion

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Q21. Which quantity is a vector in projectile motion?

A) Time

B) Mass

C) Velocity

D) Energy

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Q22. Which statement about vectors is correct?

A) They have only magnitude

B) They have direction only

C) They have magnitude and direction

D) They have no units

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Q23. Weight is always directed:

A) Upward

B) Sideways

C) Toward Earth’s center

D) Randomly

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Q24. Why is momentum not a scalar?

A) It depends on direction of velocity

B) It has no magnitude

C) It has no unit

D) It depends on time only

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Q25. Which of the following is a vector quantity in physics experiments?

A) Mass measured

B) Temperature recorded

C) Force applied

D) Energy stored

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Q26. Electric field direction is defined by:

A) Mass of object

B) Force on a positive charge

C) Temperature change

D) Speed of particle

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Q27. Which quantity is vector in nature during free fall?

A) Time

B) Speed

C) Acceleration due to gravity

D) Distance

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Q28. Which statement correctly differentiates scalar and vector quantities?

A) Scalars have direction only

B) Vectors have magnitude only

C) Vectors require magnitude and direction

D) Scalars depend on direction

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Q29. Why is displacement a vector while distance is a scalar?

A) Displacement has no magnitude

B) Distance has direction

C) Displacement includes direction

D) Both are vectors

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Q30. Which of the following is NOT a vector quantity?

A) Acceleration

B) Momentum

C) Energy

D) Force

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Q31. Which quantity always points toward the center of Earth?

A) Velocity

B) Force

C) Weight

D) Momentum

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Q32. Why is acceleration a vector in circular motion?

A) Only magnitude changes

B) Direction of motion changes continuously

C) Mass changes

D) Time stops

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Q33. Which of the following best defines a vector quantity?

A) Only measurable

B) Only directional

C) Has magnitude and direction

D) Has no unit

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Q34. Which quantity depends on velocity direction?

A) Mass

B) Momentum

C) Temperature

D) Time

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Q35. Which is a correct real-life vector example?

A) 50 kg mass

B) 20°C temperature

C) 10 N force east

D) 100 J energy

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Q36. Which statement is correct about gravitational field strength?

A) It is scalar because it has no direction

B) It is vector because it has direction toward mass

C) It is scalar because it depends on mass only

D) It is neither scalar nor vector

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