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d. 0 35. A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement? ? a. 40 meters, South b. 50 meters, North 36. If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement? a. Om b. 20 m c. 50 meters, South d. 40 meters, North C. 40 m d. -20 m 37. A car moved 60 km East and 90 km West. What is the distance it traveled? a. 30 km, west c. 60 km, east b. 90 km d. 150 km 38. If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement? a. 12 km c. 19 km, east b. 31 km d. 43 km, east 20 nidont'e airplane Air Force One flies at 250 m/s to the

d. 0 35. A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement? ? a. 40 meters, South b. 50 meters, North 36. If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement? a. Om b. 20 m c. 50 meters, South d. 40 meters, North C. 40 m d. -20 m 37. A car moved 60 km East and 90 km West. What is the distance it traveled? a. 30 km, west c. 60 km, east b. 90 km d. 150 km 38. If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement? a. 12 km c. 19 km, east b. 31 km d. 43 km, east 20 nidont'e airplane Air Force One flies at 250 m/s to the

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of 1.2 c. doesn't change Increased by a factor of V2 d. 34. Five equal forces of 10 N are applied at a point. If the angle between them is equal, what is the resultant force? a. 10 N c. 14.14 N 35. A car travels 90 meters due north in 15 seconds. Then the car c. 20 N d. 0 turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement? ? a. 40 meters, South b. 50 meters, North c. 50 meters, South d. 40 meters, North 36. If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement? ne a. Om C. 40 m d. -20 m b. 20 m 37. A car moved 60 km East and 90 km West. What is the distance it traveled? c. 60 km, east 30 km, west b. a. 90 km d. 150 km 38. If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement? c. 19 km, east d. 43 km, east a. 12 km b. 31 km 39. The president's airplane, Air Force One, flies at 250 m/s to the east with respect to the air. The air is moving at 35 m/s to the north with respect to the ground. Find the velocity of Air Force One with respect to the ground. c. 222 m/s a. 252 m/s b. 435 m/s d. 125 m/s 40. A motorboat, which has a speed of 5 meters per second in still water, is headed east as it crosses a river flowing south at 3.3 meters per second. What is the magnitude of the boat's resultant velocity with respect to the starting point? C. 5 m/s a. 3.3 m/s b. 6 m/s d. 8.3 m/s
Transcribed Image Text:of 1.2 c. doesn't change Increased by a factor of V2 d. 34. Five equal forces of 10 N are applied at a point. If the angle between them is equal, what is the resultant force? a. 10 N c. 14.14 N 35. A car travels 90 meters due north in 15 seconds. Then the car c. 20 N d. 0 turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement? ? a. 40 meters, South b. 50 meters, North c. 50 meters, South d. 40 meters, North 36. If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement? ne a. Om C. 40 m d. -20 m b. 20 m 37. A car moved 60 km East and 90 km West. What is the distance it traveled? c. 60 km, east 30 km, west b. a. 90 km d. 150 km 38. If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement? c. 19 km, east d. 43 km, east a. 12 km b. 31 km 39. The president's airplane, Air Force One, flies at 250 m/s to the east with respect to the air. The air is moving at 35 m/s to the north with respect to the ground. Find the velocity of Air Force One with respect to the ground. c. 222 m/s a. 252 m/s b. 435 m/s d. 125 m/s 40. A motorboat, which has a speed of 5 meters per second in still water, is headed east as it crosses a river flowing south at 3.3 meters per second. What is the magnitude of the boat's resultant velocity with respect to the starting point? C. 5 m/s a. 3.3 m/s b. 6 m/s d. 8.3 m/s
41. A person observes a fireworks display from a safe distance ct 0.750 kilometer. Assuming that sound travels at 340 meters ne second in air, what is the time between the person seeing and hearing a fireworks explosion? c. 2.21 s d. 255,000 s a. 0.453 s b.410 s 42. A child walks 5 meters north, then 4 meters east, and finally 2 meters south. What is the magnitude of the resultant displacement of the child after the entire walk? С. 5 m d. 11 m a. 1 m b. 3 m 43. An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which one has the greater range? (assume no air resistance) 25 degrees Same for both c. 65 degrees d. none of the above a. b. 44. An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which one rises to a higher height? (assume no air resistance) a. 25 degrees c. 65 degrees d. 45 degrees b. same for both 45. An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which is in the air for longer? (assume no air resistance) a. 25 degrees c. 65 degrees d. 25 degrees b. same for both 46. If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which will hit the ground first? c. dropped bullet d. all of the above a. shot bullet b. hit at the same time 47. Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long. a. 0.38 N b. 0.55 N C. 1.23 N d. 1.66 N 48. If a sprinter runs in a circle of radius 50m in 31 seconds at a constant speed, how fast were they running?
Transcribed Image Text:41. A person observes a fireworks display from a safe distance ct 0.750 kilometer. Assuming that sound travels at 340 meters ne second in air, what is the time between the person seeing and hearing a fireworks explosion? c. 2.21 s d. 255,000 s a. 0.453 s b.410 s 42. A child walks 5 meters north, then 4 meters east, and finally 2 meters south. What is the magnitude of the resultant displacement of the child after the entire walk? С. 5 m d. 11 m a. 1 m b. 3 m 43. An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which one has the greater range? (assume no air resistance) 25 degrees Same for both c. 65 degrees d. none of the above a. b. 44. An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which one rises to a higher height? (assume no air resistance) a. 25 degrees c. 65 degrees d. 45 degrees b. same for both 45. An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which is in the air for longer? (assume no air resistance) a. 25 degrees c. 65 degrees d. 25 degrees b. same for both 46. If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which will hit the ground first? c. dropped bullet d. all of the above a. shot bullet b. hit at the same time 47. Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long. a. 0.38 N b. 0.55 N C. 1.23 N d. 1.66 N 48. If a sprinter runs in a circle of radius 50m in 31 seconds at a constant speed, how fast were they running?
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