29. If A 21+j+k and B=1+2j+2k, find the magnitude of component of (A+B) along B: (1) 4 unit (2) 5 unit (3) 6 unit (4) 7 unit 30. Which of the following group of forces cannot produce the resultant of 2N? (1) 2N and 4N (2) 1N and 3N (3) 5N and 10 N (4) 10N and 11N 31. If two vectors are shown as in figure then B-A will be shown as: A B (1) 7 (4) 32. The force is given in terms of time (t) and displacement (x) by the equation: F = A cosBx + C sinDt D Then dimensions of are :- B (1) MLTo (2) MLT- (3) MLT-1 (4) ML-10