HYSICS (Vector-Projectile) Multiple Choices Direction: Choose the letter of the best answer. On the answer sheet, shades the circle corresponding to the letter of your choice. 1. Vector is a quantity having a. magnitude and unit b. magnitude and direction c. unit and direction d. magnitude only 2. Which of the following methods of resolving vectors gives the most accurate result? a. polygon method b. pythagorean method c. graphical method d. parallelogram method 3. Which of the following methods is applicable for adding more than two vectors? a. parallelogram b. component c. pythagorean d. sine and cosine law 4. The summation of components in x and y are negative and positive, respectively. The direction of resultant having these components is a. N of E b. N of W c. E of N d. S of W 5. Which of the following vector properties is INCORRECT? a. A + B=B+A b. A . B = B . A C. AXB =B X A d. A - B = - B+A 6. The vectors a, b, and c are related by c = b - a. Which diagram below illustrates this relationship? a B D 7. A particle moves along the x axis from x; to x, . Of the following values of the initial and final coordinates, which results in the displacement with the largest magnitude? a. X. = 4m, X- = 6m b. x; = -4m, x. =-8m C. X. = -4m, X- = 2m d. x; = 4m, X. = -2m 8. The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt2. The units of the quantities a and b are respectively: a. m /s, m3/s2 b. m/s, my/s c. m/s, m/ s d. m'/s, s2/m 9. Is it possible for the velocity to be equal to zero and the speed is non zero? a. Yes, speed is constant in this situation b. Yes, speed is increasing c. No, speed is either increasing or decreasing d. No, it doesn't happen 10. A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s2 south. After 6 seconds its velocity will be: a. 7 m/s north 7 m 43 m/s