physics_test_bank_split_3

Tham khảo tài liệu 'physics_test_bank_split_3', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http 18. A vector in the xy plane has a magnitude of 25 m and an x component of 12 m. The angle it makes with the positive x axis is A. 26 B. 29 C. 61 D. 64 E. 241 ans C 19. The angle between A 25m i 45 m J and the positive x axis is A. 29 B. 61 C. 151 D. 209 E. 241 ans B 20. The angle between A 25m i 45m j and the positive x axis is A. 29 B. 61 C. 119 D. 151 E. 209 ans C 21. Let A 2 m i 6m j 3 m k and B 4 m i 2 m j 1 m k. The vector sum S A B is A. 6m i 8m j 2m k B. 2m i 4m j 4m k C. 2m i 4m j 4m k D. 8m i 12m j 3m k E. none of these ans A 22. Let A 2m i 6m j 3m k and B 4m i 2mj 1 m k. The vector difference D A B is A. 6m i 8m j 2m k B. 2m i 4m j 4m k C. 2m i 4m j 4m k D. 8m i 12m j 3m k E. none of these ans B Chapter 3 VECTORS 31 Simpo PDF Merge and Split Unregistered Version - http 23. If A 2 m i 3m J and B 1 m i 2 m J then A 2B A. 1m j B. 1m j C. 4 m i 7 m j D. 4m i 1 m j E. 4 m i 7 m j ans A 24. In the diagram A has magnitude 12 m and B has magnitude 8 m. The x component of A B is about A. m B. C. 12 m D. 14 m E. 15 m ans C 25. A certain vector in the xy plane has an x component of 4 m and a y component of 10 m. It is then rotated in the xy plane so its x component is doubled. Its new y component is about A. 20 m B. m C. D. m E. m ans B 26. Vectors A and B each have magnitude L. When drawn with their tails at the same point the angle between them is 30 . The value of A B is A. zero B. L2 C. V3L2 2 D. 2L2 E. none of these ans C 32 Chapter 3 VECTORS Simpo PDF Merge and Split Unregistered Version - http 27. Let A 2 m i 6m J 3m k and B 4 m i 2 m J 1 m k. Then A B A. 8m i 12m j 3m k B. 12m i 14m j 20m k C. 23 m2 D. 17m2 E. none of these ans D 28. Two vectors have magnitudes of 10 m and 15 m. The angle between them when they are drawn with their tails at the same point is 65 . The component of the longer vector along the line of the shorter .