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a. mZ/is, m3/s2 b. m/sz, mz/s c. m/s, m/ s2 d. m3/s, sZ/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 0. 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 III/$2 south After 6 seconds its velocity will be: a. 7 m/s north b. 7 m/s south c. 43 m/s north d. 20 m/s north 11. A car travels 40 kilometers at an average speed of 80km/h and then travels 40 kilometers at an average Speed of 40km/h. The average speed of the car for this 80-km trip is: a. 40km/h b. 45km/h c. 48km/h d. 53km/h 12. Throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be: a. positive and negative, respectively b. negative and positive, respectively C. negative and negative, respectively (1. negative and zero, respectively 13. A car moves at a constant velocity of 36 m/s in 4s, its acceleration is a. 9111/s2 b. 9m/sZ c. 2.25 m/s2 (1. 0 14. Uniform velocity means; no change in a. magnitude b. direction c. time (1. options a & b 15. A stone is released from a balloon that is descending at a constant speed of 10 m/s. Neglecting air resistance, after 20 s the speed ofthe stone is: a.2160 m/s b. 1760 m/s 0. 206 m/s d. 196 m/s 16. A ball rolls up a slope. At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0. What is the average acceleration from the third to the eighth second? a. 2.5 cm/s2 b. 4.0 cm/s2 c. 5.0 cm/s2 d. 6.0 cm/s2 17. A stone thrown from the top of a tall building follows a path that is: a. circular b. made of two straight line segments c. hyperbolic d. parabolic 18. A bullet shot horizontally from a gun: a. strikes the ground much later than one dropped vertically from the same point at the same instant b. never strikes the ground 0. strikes the ground at approximately the same time as one dropped vertically from the same point at the same instant (1. travels in a straight line 19. A stone is thrown outward from the top of a 59.4-m high cliff with an upward velocity component of 19.5m/s. How long is stone in the air? a. 4.00 s b. 5.00 s c. 6.00 s d. 7.00 s 20. In order for an object to accelerate, a. there must be change in the magnitude of velocity. 0. there must be uniform velocity. b. there must be change in the direction of velocity. d. both Options a and b are COHF
