1. Semester 1 Exam Review

2. Don’t click until I tell you 1.Choice 1 2.Choice 2 3.Choice 3 4.Choice 4

3. Quantity that has both magnitude and direction: 1.Scalar 2.Directrix 3.Pointer 4.Vector

4. Acceleration describes: 1.How fast something is moving 2.How fast something is moving and in what direction 3.How quickly the velocity is changing 4.How quickly the position is changing

5. An object moving at 24 m/s comes to rest in 8 seconds. The average acceleration is: 1.-24 m/s 2 2.-16 m/s 2 3.3.0 m/s 2 4.-3.0 m/s 2

6. The magnitude of 3.0 m North plus 4.0 m East is: 1.7.0 m 2.1.0 m 3.5.0 m 4.0.75 m

7. Metric prefix meaning “thousands” 1.Milli 2.Centi 3.Mega 4.Kilo

8. SI units of mass 1.Newtons 2.Kilograms 3.Pounds 4.Gallons

9. Metric prefix meaning x10 -9 1.Giga 2.Pico 3.Nano 4.centi

10. The amount of space occupied by an object 1.Mass 2.Volume 3.Density 4.Weight

11. Which is NOT a vector quanity? 1.Speed 2.Acceleration 3.Force 4.Velocity

12. Metric prefix meaning “million” 1.Mega 2.Kilo 3.Pico 4.Giga

13. Which is NOT a base unit in the SI system? 1.Candela 2.Newton 3.Kilogram 4.Meter

14. (8.0 x 10 12 )/ (2.0 x 10 6 ) 1.4.0 x 10 6 2.4.0 x 10 18 3.16 x 10 2 4.4.0 x 10 2

15. Precision is affected by_____ while accuracy is affected by ______. 1.Systematic errors, random errors 2.Incorrectly calibrated instruments, taking a large number of measurments 3.Random errors, systematic errors 4.None of the above

16. 6.00 x 10 6 + 4.0 x 10 4 = ? 1.10 x 10 10 2.6.5 x 10 5 3.4.06 x 10 4 4.6.04 x 10 6

17. Metric prefix meaning times 10 -6 1.Milli (m) 2.Micro (  ) 3.Centi (c) 4.Nano (n)

18. How long does it take for a car going 2 m/s to reach a speed of 6 m/s if it accelerates at 2.0 m/s 2 ? 1.1.0 s 2.2.0 s 3.3.0 s 4.8.0 s

19. A car that travels 6.0 km in 2 minutes has an average speed of: 1.12 km/min 2.3.0 m/s 3.50 m/s 4.30 m/s

20. Which of the following does NOT describe an object that is accelerating 1.A dropped ball that is speeding up 2.A baseball player slowing down as they slide into home. 3.A car going around a turn at constant speed. 4.A rocket traveling really fast.

21. Vector quantity describing how much the position of an object changes (and in what direction) 1.Distance 2.Velocity 3.Displacement 4.Acceleration

22. The displacement of a person who walks 45 m east and then walks 30 m west is: 1.75 m west 2.75 m east 3.15 m east 4.1.5 m w

23. The acceleration of an object in uniform circular motion: 1.Is zero 2.Points outward 3.Points to the center 4.Points in the direction the object is moving

24. The acceleration of an object that increases speed from 5.0 m/s to 15 m/s in 10 seconds is: 1.10 m/s 2 2.20 m/s 2 3.1.0 m/s 2 4.0.5 m/s 2

25. Which of the following is NOT a valid kinematics formula? 1.v f 2 =v i 2 + 2at 2.d=1/2 (v i + v f ) t 3.d = v i t + ½ at 2 4.a=  v/  t

26. Speed a dropped object will be traveling 3 seconds later: 1.10 m/s 2.15 m/s 3.25 m/s 4.30 m/s

27. The horizontal acceleration of a projectile on earth. 1.+9.8 m/s 2 2.-9.8 m/s 2 3.0.0 m/s 2 4.-32 ft/s 2

28. The horizontal and vertical parts of a diagonal vector. 1.Resultants 2.Components 3.Cosecants 4.Hypotneuses

29. A projectile is launched at 20 m/s at an angle of 30 o above horizontal. The vertical component of its initial velocity is: 1.10 m/s 2.20 m/s 3.17.3 m/s 4.9.8 m/s

30. A projectile is launched at 20 m/s at an angle of 30 o above horizontal. The amount of time it remains airborne is about. 1.1.0 seconds 2.2.0 seconds 3.4.0 seconds 4.6.0 seconds

31. What is the momentum of a 6.0 kg object traveling at 5.0 m/s? 1.11 kg m/s 2.75 kg m/s 3.30 kg m/s 4.1.2 kg m/s

32. A 6.0 kg object traveling at 5.0 m/s strikes a 2.0 kg object that is initially at rest. What is the total momentum following the collision? 1. 11 kg m/s 2.75 kg m/s 3.30 kg m/s 4.Can not be determined

33. A 6.0 kg object traveling at 5.0 m/s strikes a 2.0 kg object that is initially at rest. If the objects stick together, what is their speed following the collision? 1.5.0 m/s 2.3.75 m/s 3.2.5 m/s 4.0.0 m/s

34. The magnitude of the centripetal acceleration. 1.a c =v/r 2 2.a c =r/v 3.a c =v 2 /r 2 4.a c =v 2 /r

35. On earth the force of gravity acting on a 4.5 kg object is 1.0.45 N 2.4.5 kg 3.45 N 4.450 N

36. Which of the following is NOT a fundamental force of nature? 1.Weak Nuclear Force 2.Electromagnetic Force 3.Friction Force 4.Gravitational force

37. A 5.0 kg object experiences a forward force of 20.0 N and a backwards force of 5 N. The acceleration is: 1.9.8 m/s 2 2.5.0 m/s 2 3.3.0 m/s 2 4.0.67 m/s 2

38. Newton’s first law states: 0 of 30 1.Moving things tend to slow down and stop if not acted on by a force. 2.Constant velocity motion is only possible if no forces act on an object. 3.This go in a straight line at constant speed when the net force is zero. 10

39. Demonstrated that objects on earth experience a gravitational attraction? 0 of 30 1.Kepler 2.Newton 3.Galileo 4.Cavendish 10

40. If the frictional force is 40 N and the normal force is 200 N the frictional coefficient is: 0 of 30 1.5.0 2.0.5 3.0.4 4.0.2 10

41. Formulated three laws of planetary motion: 0 of 30 1.Galileo 2.Einstein 3.Kepler 4.Newton 10

42. If 2.0 kg weighs 8.0 N on the surface of a planet, the acceleration of a dropped object would be: 0 of 30 1.10 m/s 2 2.Depends on the mass 3.16 m/s 2 4.4.0 m/s 2 10

43. What is the acceleration of a car going around a 100 m radius turn at a constant speed of 20 m/s? 0 of 30 1.0 m/s 2 2.10 m/s 2 3.0.20 m/ 2 4.4.0 m/s 2 10

44. A projectile is launched horizontally from a cliff at 40 m/s. Three seconds later the horizontal component of its velocity is: 0 of 30 1.10 m/s 2.30 m/s 3.40 m/s 4.50 m/s 10

45. A projectile is launched horizontally from a cliff at 40 m/s. Three seconds later the vertical component of its velocity is: 0 of 30 1.10 m/s 2.30 m/s 3.40 m/s 4.50 m/s 10

46. A projectile is launched horizontally from a cliff at 40 m/s. Three seconds later its speed is: 0 of 30 1.10 m/s 2.30 m/s 3.40 m/s 4.50 m/s 10

47. A ball is thrown straight upward at 20 m/s. It returns to where it was thrown in: 0 of 30 1.1.0 s 2.2.0 s 3.3.0 s 4.4.0 s 10

48. Micro (  ) 0 of 30 1.x10 -9 2.x10 -6 3.x10 +3 4.x10 +12 10

49. A ball that is thrown straight up at 20 m/s reaches a maximum height of 0 of 30 1.10 m 2.20 m 3.40 m 4.80 m 10

50. A ball is thrown straight up. At its highest point its velocity is ____ and its acceleration is _____ 0 of 30 1.0, 0 2.0, 10 m/s 2 down 3.10 m/s, 0 4.10 m/s, 10 m/s 2 up 10

51. A horizontal force of 35 N causes a 2.0 kg object to accelerate at 2.5 m/s 2 across the floor. The net force is____. 0 of 30 1.35 N 2.20 N 3.5.0 N 4.0.0 N 10

52. A horizontal force of 35 N causes a 2.0 kg object to accelerate at 2.5 m/s 2 across the floor. The frictional force is____. 0 of 30 1.35 N 2.30 N 3.10 N 4.0 N 10

53. A horizontal force of 35 N causes a 2.0 kg object to accelerate at 2.5 m/s 2 across the floor. The coefficient of friction is____. 0 of 30 1.1.5 2.0.67 3.0.20 4.0.10 10

54. If a 2.0 kg textbook were taken to the moon its mass there would be: 0 of 30 1.Significantly smaller than on earth. 2.Zero 3.Still 2.0 kg 4.Significantly larger than on earth 10

55. Kepler determined that planets travel in ________ orbits. 0 of 30 1.Circular 2.Elliptical 3.Parabolic 4.Linear 10

56. What is the mass of an 18 kg object on earth? 0 of 30 1.1.8 kg 2.1.8 N 3.18 kg 4.180 N 10

57. An object will fall at constant speed 0 of 30 1.Once air resistance exerts a force equal to the weight of the object 2.Only on the moon 3.Only if it has a parachute or a propeller. 4.Only if there is no gravity 10

58. On earth 1.0 kg weighs 0 of 30 1.2.2 lbs 2.0.1 N 3.1.0 kg 4.2.54 lbs 10

59. Forces are measured in: 0 of 30 1.Newtons 2.Kilograms 3.Pascals 4.m/s 2 10

60. A push or a pull 0 of 30 1.Acceleration 2.Pressure 3.Force 4.Mass 10

61. Equal to kg∙m/s 2. 0 of 30 1.Liters 2.Mph 3.Newtons 4.Watts 10

62. Tendency of an object to continue moving like it already was. 0 of 30 1.Density 2.Power 3.Force 4.Inertia 10

63. A 5.0 kg object experiences a forward force of 20.0 N and a backwards force of 5 N. The net force is: 0 of 30 1.50 N 2.25 N 3.75 N 4.15 N 10

64. Things have more inertia if they have a greater: 0 of 30 1.Density 2.Volume 3.Mass 4.Free fall acceleration 10

65. If a 140 kg football player collides with an opponent who is only 60 kg which player exerts a larger force? 0 of 30 1.The 140 kg player 2.The 60 kg player 3.The forces are equal in magnitude 10

66. A solid block of metal measures 5 cm x 6 cm x 10 cm and has a mass of 1.8 kg. The density of the metal is: 0 of 30 1.3.0 g/cm 3 2.300 g/cm 3 3.6.0 g/cm 3 4.1.0 g/cm 3 10