|
|
| Mechanical
Physics Quiz Two Review Questions |
|
|
|
|
|
|
|
| Mechanical
Physics Quiz Two Review Questions |
|
|
|
|
| Mechanical Physics Unit #2 One Dimensional Kinematics FOOTBALL QUESTIONS 1. If an object has an acceleration of 0 m/s2, then one can be sure that the object is not a. Moving b. Changing Position c. Changing Velocity 2. If car A passes car B, then car A must be a. Accelerating b. Accelerating at a greater rate than B c. Moving at a faster rate than car B, and accelerating faster than B d. Moving faster than B, but not necessarily accelerating 3. Which one of the following is NOT consistent with a car which is accelerating? a. Moving with increasing speed b. Moving with decreasing speed c. Moving with a high speed d. Changing direction 4. Barry Sanders is running down the football field in a straight line. He starts at the 0-yard line at 0 seconds. At 1 second, he is on the 10-yard line; at 2 seconds, he is on the 20-yard line; at 3 seconds, he is on the 30-yard line; and at 4 seconds, he is on the 40-yard line. This is evidence that a. He is accelerating b. He is covering a greater distance in each consecutive second c. He is moving with a constant speed (on average) 5. Barry Sanders is running down the football field in a straight line. He starts at the 0-yard line at 0 seconds. At 1 second, he is on the 10-yard line; at 2 seconds, he is on the 20-yard line; at 3 seconds, he is on the 30-yard line; and at 4 seconds, he is on the 40-yard line. What is Barry's acceleration? 6. Olympic gold medalist Michael Jackson runs one time around the track - 400 meters - in 38 seconds. What is his displacement? 7. What is his average velocity? 8. If an object is moving eastward and slowing down, then the direction of its velocity vector is a. Eastward b. Westward c. Neither d. Not enough info to tell 9. If an object is moving eastward and slowing down, then the direction of its acceleration vector is a. Eastward b. Westward c. Neither d. Not enough info to tell 10. Which one of the following quantities is NOT a vector? a. 10 mi/hr east b. 10 mi/hr/sec east c. 35 m/s north d. 20 m/s 11. Which one of the following quantities is NOT a speed? a. 10 mi/hr b. 10mi/hr/sec c. 35 m/s d. 20 m/s 12. Which one of the following statements is NOT true of a free-falling object? An object in a state of free fall a. Falls with a constant speed of -10m/s b. Falls with an acceleration of -10m/s/s c. Falls under the sole influence of gravity d. Falls with downward acceleration which has a constant magnitude. 13. The average speed of a horse which gallops 10 kilometers (km) in 30 minutes is a. 10km/hr b. 20km/hr c. 30km/hr d. more than 30km/hr 14. What is the acceleration of a car that maintains a constant velocity of 100 km/hr for 10 seconds? a. 0 b. 10km/hr/sec c. 10km/s/s d. 1000km/hr/sec 15. As an object freely falls, its a. Speed increases b. Acceleration increases c. Both of these d. None of these 16. If a freely-falling object were somehow equipped with a speedometer, its speed reading (neglecting air resistance) would increase each second by about a. 5m/s b. 10m/s c. 15m/s d. A variable amount e. Depends on its initial speed 17. Ten seconds after starting from rest, a freely-falling object will have a speed of about a. 10 m/s b. 50 m/s c. 100 m/s d. more than 100 m/s 18. As a baseball is thrown, its speed increases from 0 to 30 m/s in 0.10 seconds. The average acceleration of the baseball is a. 3m/s/s b. 30m/s/s c. 300 m/s/s d. 3000 m/s/s e. none of these 19. A rocket accelerates from rest for 1 minute at 50 m/s2. The rocket's speed will be a. 50m/s b. 500 m/s c. 3000 m/s d. 3600 m/s e. none of these 20. If you drop an object, it will accelerate downward at a rate of 9.8 m/s2. If you instead throw its downwards, it acceleration (in the absence of air resistance) will be a. Less than 9.8 m/s/s b. 9.8 m/s/s c. more than 9.8 m/s/s 21. Consider drops of water that leak from a dripping faucet at a constant rate. As the drops fall they a. Get closer together b. Get farther apart c. Remain at a relatively fixed distance from one another 22. What does the area of a velocity time graph represent? a. Velocity b. Speed c. Displacement d. Time 23. Velocity is ... a. A vector b. Speed in a specific direction c. Displacement per unit time d. All of these 24. Which of the following is an example of uniform motion? a. a car set on cruise control at 80 km/h on a straight stretch of road b. a flowerpot dropped from a window c. a merry-go-round traveling at 20m/s d. a ball thrown in the air 25. Displacement is a. the amount of water displaced by a ship's hull b. the distance covered in a given direction c. the total distance covered d. total distance covered in an amount of time 26. On a displacement-time graph the ... is equal to the slope of the straight line joining two graphed points. a. Acceleration b. Velocity c. Position d. Tangent 27. How far will a woman travel in 48 minutes if she is cycling down the highway at 15 m/s? a. 4.3km b. 43 km c. 12 m d. 1200 m 28. An object's uniform motion is plotted on a velocity time graph. The y intercept of the graph is at the value 5 m/s and the duration of the motion is 10 seconds. The displacement of the object is ... a. 2m b. 0.5 m c. 50m d. 15m 29. What is the average speed of an athlete that runs the 51 m sprint in 4.75s? a. 11m/s b. 10 m/s c. 10.7 m/s d. 12 m/s 30. Two heavy solid metal spheres are released from the same height from rest. Sphere 2 has a mass twice as big as that of sphere 1. a. Sphere 1 will take twice as long to hit the ground as Sphere 2 b. Sphere 2 will take twice as long to hit the ground as Sphere 1 c. Both Spheres will hit the ground at the same time d. Sphere 1 will take 10% longer to hit the ground than Sphere 2 31. What exactly is meant by a ‘freely falling object?” 32. What kind of speed is measured by an automobile speedometer? Average speed or instantaneous speed? 33. What is the difference between instantaneous speed and average speed? 34. What is the average speed in kilometers per hour for a horse that gallops a distance of 15km in 30 min? 35. How far does a horse travel if it gallops at an average speed of 25km/hr for 30 minutes? 36. What is the difference between speed and velocity? 37. If a car moves with a constant velocity, does it also move with constant speed? 38. If a car is moving at 90km/hr and it rounds a corner, also at 90 km/hr, does it maintain a constant speed? A constant velocity? 39. What is the difference between velocity and acceleration? 40. What is the acceleration of a car that increases its velocity from 0, to 100 km/hr in 10 seconds? 41. What is the acceleration of a car that maintains a constant velocity of 100km/hr for 10 seconds? (Why do some of your classmates who correctly answer the previous question get this question wrong?) 42. When are you most aware of motion in a moving vehicle – when it is moving steadily in a straight line or when it is accelerating? If a car moved with absolutely constant velocity (no bumps at all), would you be aware of motion? 43. Acceleration is generally defined as the time rate of change of velocity. When can it be defined as the time rate of change of speed? 44. What is the gain in speed per second for a freely falling object? 45. What is the velocity acquired by freely falling object 5seconds after being dropped from rest? 46. The acceleration of free fall is about 10m/s/s. Why does the seconds unit appear twice? 47. When an object is thrown upward, how much speed does it lose each second? 48. Consider these measurements: 10m, 10m/s and 10m/s/s. Which is a measure of distance, which is a measure of speed and which of acceleration? 49. What is the impact speed when a car moving at 100km/h bumps into the rear of another car traveling in the same direction at 98km/h? 50. One airplane travels due north at 300km/hr while another travels due south at 300km/hr. Are their speeds the same? Are their velocities the same? 51. Is a fine for speeding based on instantaneous speed or average speed? 52. Light travels in a straight line at a constant speed of 300,000m/s. What is the acceleration of light? 53. Can an automobile with a velocity towards the North simultaneously have an acceleration towards the south? Explain. 54. Can an object reverse its direction of travel while maintaining a constant acceleration? If so give an example, if not explain why. 55. What is the acceleration of a car that moves at a steady velocity of 100km/hr for 100 seconds? Explain your answer. 56. For a freely falling object dropped from rest, what is the acceleration at the end of the 5th second? The 10th second? Defend your answers. 57. Two cars are moving in the same direction in parallel lanes along a high way. At some instant, the instantaneous velocity of car A exceeds the instantaneous velocity of car B. Does this mean that car A’s acceleration is greater than car B’s? Explain using examples 58. A ball is shot from a launcher high into the air from ground level. What is the speed of the ball just before it reaches the earth? 59. Two children are bouncing small rubber balls. One child simply drops a ball. At the same time, the second child throws a ball downward so that it has an initial speed of 10m/s. What is the acceleration of each ball while in motion? 60. Sketch a position vs. time graph for the following situation: an object at rest 61. Sketch a position vs. time graph for the following situation: An object with constant positive velocity 62. Sketch a position vs. time graph for the following situation: An object with constant negative velocity 63. If the average velocity of a duck is zero in a given time interval, what can you say about the displacement of the duck for that interval? 64. Velocity can be either positive or negative, depending on the direction of the displacement. The time interval t, is always positive. Why? 65. El Paso is 1142 km south of Denver. If a bus makes the trip in 15.08 hours, what is its average velocity? 66. What is the acceleration for a turtle moving with a constant velocity of 0.25 m/s to the right? 67. A car accelerates uniformly from rest to a speed of 65km/hr (18m/s) in 12 seconds. Find the distance the car travels during this time. 68. A ball thrown upward is caught by the thrower after 5.0s. What is the initial velocity of the ball? 69. |
Mechanical Physics | Wave Physics | AP
| Astronomy | Astronomy Picture of
the Day
| Ms. Johnson | Northampton
Physics | Northampton
High School | Top
|
|
| "Very strange people, physicists - in my experience the ones who aren't dead are in some way very ill" - Mr. Standish "The Long Dark Tea-Time of the Soul" by Douglas Adams |
|
|