A weight lifter can bench press How many milligrams (mg) is this? A) 1.71 108 mg B) 1.71 109 mg C) 1.71 107 mg D) 1.71 106 mg 2. Which of the following is a scalar quantity? A) Speed B) Velocity C) Displacement D) Acceleration E) None of these 3. Starting from city A, a car drives 250 miles east to city B, 300 miles north to city C, and finally 700 miles west to city D. What is the distance between city A and city D? A) 450 mi B) 460 mi C) 540 mi D) 680 mi 4. If you run a complete lap around an outdoor track (400 m), in 100s, your average velocity is... A) 0.25 m/s B) 4.0 m/s C) 40,000 m/s D) zero 5. A particle moves along the x axis from xi to x f . Of the following values of the initial and final coordinates, which results in the displacement with the largest magnitude? A) xi = 4m, x f = 6m B) xi = -4m, x f = -8m C) xi = -4m, x f = 2m D) xi = 4m, x f = -2m E) xi = -4m, x f = 4m 6 As shown A has magnitude 12 m and B has magnitude 8 m. The x component of A+B is A) 5.5 m B) 7.6 m C) 12.5 m D) 14.1 m E) 15.9 m FIGURE 2-6 7. Refer to Figure 2-6. If you start from the Art Gallery, travel to the Cafe, and then to the Bakery, what is the magnitude of your displacement? A) 6.5 km B) 2.5 km C) 10.5 km D) 0 km E) 1.5 km 8. If the velocity of an object is zero at some point, then its acceleration must also be zero at that point. A) True B) False 9. Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about the direction of its acceleration is correct? A) The acceleration is toward the east. B) Since the car is slowing down, its acceleration must be negative. C) The acceleration is zero. D) The acceleration is toward the west.

10. A car traveling 60 km/h accelerates at the rate of 2.0 m/s2. How much time is required for the car to reach a speed of 90 km/h? A) 15 s B) 30 s C) 45 s D) 4.2 s 11. A cart with an initial velocity of 5.0 m/s experiences a constant acceleration of 2.0 m/s2. What is the cart's displacement during the first 6.0 seconds of its motion? A) 10 m B) 36 m C) 55 m D) 66 m E) 80 m 12. A car accelerates from 10.0 m/s to 30.0 m/s at a rate of 3.00 m/s2. How far does the car travel while accelerating? A) 399 m B) 226 m C) 80.0 m D) 133 m 13 A racing car traveling with constant acceleration increases its speed from 10 m/s to 30 m/s over a distance of 60 m? How long does this take? A) 3.0 s B) 4.0 s C) 5.0 s D) 8.0 s E) The time cannot be calculated since the speed is not constant 14. A car, initially at rest, travels 20 m in 4 s along a straight line with constant acceleration. The acceleration of the car is: A) 0.4 m/s2 B) 1.3 m/s2 C) 2.5 m/s2 D) 4.9 m/s2 E) 9.8 m/s2 15. When a ball is thrown straight up with no air resistance, the acceleration at its highest point A) is upward B) is downward C) is zero D) reverses from upward to downward E) reverses from downward to upward 16 Neglecting the effect of air resistance, a stone dropped off a 175-m high building lands on the ground in: A) 3 s B) 4 s C) 6 s D) 18 s E) 36 s 17. An object is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2. What is the maximum height reached by the object? A) 7.0 m B) 10 m C) 14 m D) 28 m 18. A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water, assuming negligible air resistance? A) 14 m B) 16 m C) 20 m D) 24 m 19. A boy throws a rock with an initial velocity of at 30.0 above the horizontal. How long does it take for the rock to reach the maximum height of its trajectory if air resistance is negligibly small and g = 9.80 m/s2? A) 0.160 s B) 0.282 s C) 0.313 s D) 0.441 s 20. An athlete competing in the long jump leaves the ground with a speed of 9.14 m/s at an angle of 35 above the horizontal. How long does the athlete stay in the air, assuming no significant air resistance?

A) 0.50 s B) 0.88 s C) 1.1 s D) 2.5 s E) 0.54 s