Question

8. The result of (jxk)x(kxt) is: A) 0 в) +1 C) t D) 1 9. If Ιλ + i-A + B and neither λ nor vanish, then: A) A and li are parallel and in the same direction B) A and B are parallel and in opposite directions C) the angle between A and B is 45 D) the angle between A and B is 60 EA is perpendicular to ธิ Vector A has magnitude of 29 units and points in positive y-direction. When vector i is added to A, the resultant vector A + B points in negative y-direction with a magnitude of 14 units. Find the magnitude and direction of B. A) 43 units in the positive y-direction C) 15 units in the positive y-direction E) 29 units in the positive y-direction B) 43 units in the negative y-direction D)15 units in the negative y-direction 11. A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h. The average speed of the car for this 80 km trip is: A) 40 km/h B) 45 km/h C) 53 km/h D) 60 km/h E) 80 km/h

Answer 1