Motion in a Plane – Scalars & Vectors, Vector Addition

Grade 11 Physics — Motion in a Plane – Scalars & Vectors, Vector Addition: 25 practice questions with instant scoring and explanations.

1. Which of the following is a scalar quantity?
2. Which of the following is a vector quantity?
3. The magnitude of the resultant of two vectors of magnitudes 3 and 4 acting at right angles is:
4. If two vectors of equal magnitude P make an angle of 60° with each other, the magnitude of their resultant is:
5. The resultant of two vectors is maximum when the angle between them is:
6. The resultant of two vectors is minimum when the angle between them is:
7. Two equal vectors have a resultant equal in magnitude to either. The angle between them is:
8. Vector addition obeys which of the following laws?
9. A unit vector is a vector whose magnitude is:
10. The unit vector along the x-axis is denoted by:
11. If A⃗ = 3î + 4ĵ, the magnitude of A⃗ is:
12. The angle θ that A⃗ = î + ĵ makes with the x-axis is:
13. Null vector has magnitude:
14. Two vectors are said to be equal if they have:
15. The parallelogram law of vector addition gives the resultant R of vectors P and Q inclined at angle θ as:
16. Three vectors each of magnitude A are in equilibrium. The angle between any two is:
17. If |A⃗ + B⃗| = |A⃗ − B⃗|, then the angle between A⃗ and B⃗ is:
18. Which of the following cannot be the resultant of two vectors of magnitudes 3 N and 5 N?
19. A vector whose magnitude is same but direction is opposite is called:
20. Position vector gives:
21. Two forces of 5 N each act on a body at 90°. The resultant force is:
22. The triangle law of vector addition applies to:
23. If the resultant of two equal forces is equal to either one, the angle between them is:
24. Displacement is:
25. Electric current has magnitude and direction but is called a scalar because: