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 08. fa vector A bas components Av -0 and Ay c0 thes the angle that this vector makes with che positive x-axis must be in the range A) 0P to 90 B)90 to 180 D) 270° to 360 E) Cannot be determined without additional information 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) .9B) 18 D) -15) E) 51 Q10. Consider two vectors A and B shown in the figure. The sum A+ is best illustrated by A) chcice (a B) choice (b) C) choice (c) D) choice (d) E) None of the above thj id) 011. Three cars, car X, car Y, and car Z, begin accelerating from rest at the same than car Y, which is more massive than car Z. The net accelerating force exerted on each car is identical. After 10 secoads, which car has the most amount of momentun? A) They all have the same amount of momentum. B) Car X C) Car Y D) Car Z E) Cannot determine

Answer 1

7) Ans: (D)

Option D is the correct representation of the 4 vectors getting added.

Start from the bottom point, clockwise. We start with the 4th of the 4 vectors given. This is followed by 2nd 1st and 3rd vectors. The last vector shown is the resultant, which we know is formed by drawing from the starting point to the end tip.