# MSCQs of Chapter 2 – Scalars and Vectors

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# Fill in the Blanks

1. A physical quantity, which can be completely specified by its magnitude only, is called __________.

2. A physical quantity, which can be completely described by its magnitude and direction, is called __________.

3. Displacement is a __________ quantity.

4. Power is a __________ quantity.

5. Two vectors are __________ when they have same magnitude and same direction.

6. The magnitude of vector will always be __________.

7. In parallelogram law of vector addition the resultant of two vectors is represented by __________ of the parallelogram.

8. Normally law of cosine is used to determine the __________ of the resultant vector.

9. Law of __________ is normally used to determine the direction of resultant vector.

10. The magnitude of __________ will always be equal to unity.

11. The rectangular unit vectors are mutually __________ to each other.

12. The dot product of two vectors is a __________.

13. The __________ product of two vectors is a vector.

14. The scalar product can be defined as that it is the product of magnitude of two vectors and __________ of the angle between them.

15. The vector product can be defined as that it is the product of the magnitude of two vectors and __________ of the angle between them.

16. The dot product will not obey the __________ law for vector multiplication.

17. The cross product will not obey the __________ law for the vector multiplication.

18. A vector, which can be displaced parallel to itself and applied at any point, is called __________ vector.

19. Null vector can be obtained by __________ a vector with its negative vector.

20. Zero vectors have __________ particular direction.

21. If two vectors are __________ to each other then their dot product is zero.

22. If two vectors are parallel to each other then their __________ product is zero.

23. If , then the magnitude of either of the two vector is __________.

24. The direction of resultant vector in a vector product can be determined by the __________ rule.

25. The magnitude of the resultant of two vectors can be __________ than the sum of the magnitudes of individual vectors.

26. The magnitude of __________ vector will always be zero.

27. __________.

28. __________.

29. Torque is the __________ product of force and force arm.

30. __________ is the dot product of force and velocity.

31. A vector, in any given direction whose magnitude is one is called __________.

32. The set of unit vectors along x, y and z axes are called __________ unit vectors.

33. If the magnitude of the resultant of two vectors equal in magnitude is the same, then the angle between the two vectors is __________.

34. If __________.

35. Two forces, one of 6N and the other of 8N, act on a point at angle 90° with each other, the magnitude of resultant force is __________.

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