Question

Q7. There are four equal vectors as shown below Which one of following is correct about the resultant vector? B. A. D. E. Both B an D Q8. Ifa vector A has components Ay-O, and Ay c 0, then the angle that this vector makes with the positive x-axis must be in the range A) 0 to 90 D) 270 to 360 E) Cannot be determined without additional information B) 90 to 180 C) 180° to 270 09. A box of mass 1 Kg slides with initial velocity 6 m/s on a frictionless surface and collides inelastically with an identical rest box. The boxes stick together and move after the collision. What is the change of kinetic energy? A)-9I B) 181 D) -151 Q10. Consider two vectors R and e shown in the figure. The sum A + i is best illustrated by A) choice (a) B) choice (b) C) choice (c) D) choice (d) E) None of the above (ch id) Q11. Three cars, car X, car Y, and car Z, begin accelerating from rest at the same time. Car X is more massive than car Y, which is more massive than car Z. The net accelerating force exerted on each car is identical. After 10 seconds, which car has the most amount of momentum? A) They all have the same amount of momentum. B) Car X D) Car Z E) Cannot determine C) Car Y

Answer 1

So we will use polygon law of vector addition.