FINAL EXAM REVIEW KEY PHYSICS FIRST SEMESTER (01/2012) UNIT 1 Motion — 29.2 cm/s = 0.292 m/s 45 mi/h a. C b. A c. B d. C Time Position (m) Position (m) (s) Object A Object B 0 5 0 1 5 1 a 2 5 3 3 5 5 4 5 7 5 5 9 a. 2 m/s graph for each object in the table above. b. 4 m/s c. 0 m/s d. 6 m/s 6.2 s 420 miles 0.64 s (P2.2A) Which of the following are vectors? Which of the following are scalars? Distance scalar e. Velocity vector Time f. Acceleration scalar vector Displacement vector g. Mass scalar Speed scalar a. distance = 200 yards; displacement = 0 yards b. speed = 8.33 yards/sec; velocity = 0 yards/sec 27 s 15. a. 60 m b. 10 m/s2 26 m/s -29.4 m/s UNIT 2 Two-Dimensional Motion and Forces — 16. a. Horizontal velocity (vx) is constant and is equal to the initial velocity in the x-direction. Vertical velocity (vy) will decrease (becoming more negative) throughout its fall. b. The direction of acceleration is straight down and equal to -9.8 m/s2. The ball will fall back into the person's hand. a. to the ramp 444 N ┴ b. 0 N
PHYSICS FINAL EXAM REVIEW KEY FIRST SEMESTER (01/2012) UNIT 1 — Motion 29.2 cm/s = 0.292 m/s 45 mi/h a. C b. A c. B d. C a graph for each object in the table above. Time (s) Position (m) Object A Position (m) Object B 0 5 0 1 5 1 2 5 3 3 5 5 4 5 7 5 5 9 a. 2 m/s b. 4 m/s c. 0 m/s d. 6 m/s 6.2 s 420 miles 0.64 s (P2.2A) Which of the following are vectors? Which of the following are scalars? Distance scalar e. Velocity vector Time scalar f. Acceleration vector Displacement vector g. Mass scalar Speed scalar a. distance = 200 yards; displacement = 0 yards b. speed = 8.33 yards/sec; velocity = 0 yards/sec 27 s 26 m/s -29.4 m/s 15. a. 60 m b. 10 m/s2 UNIT 2 — Two-Dimensional Motion and Forces 16. a. Horizontal velocity (vx) is constant and is equal to the initial velocity in the x-direction. Vertical velocity (vy) will decrease (becoming more negative) throughout its fall. b. The direction of acceleration is straight down and equal to -9.8 m/s2. The ball will fall back into the person's hand. a. 444 N ┴ to the ramp b. 0 N