exercise 2 questions #75

1. A measure of how fast something is moving is called:

Speed

2. The property which specifies the speed and direction of motion an object is called:

Velocity

3. The speed of an athlete who covers a distance of 80 meters in 10 seconds is:

8m/s

4. If a car moved at an average speed of 80km/hr; how far would it travel in 3 hours?

240 km

5. The property of things to resist changes in state of motion is called:

Inertia

6. The force due to gravity is called:

Weight

7. A kilogram is a measure of an object's

Mass

8. Space occupied by a given mass is called:

Volume

9. The resistive force that opposes motion or attempted motion of an object is called:

Friction

10. The force that supports an object against gravity, often called the normal force, is also known as:

Support force.

11. the rate of change of velocity with time (in magnitude, direction, or both) is called:

acceleration

12. A state of fall under the influence of gravity (free from air resistance) is called:

Free fall

13. Compared with 1kg block of solid iron, a 2kg block of solid iron has twice as much:

Both of these (

14. Simply stated as push or pull

Force

15. Your weight is:

the gravitational attraction between you and the Earth

16. One object that has twice as much mass as another object also has as much:

gravitational acceleration

17. compared with the same mass of a certain object on Earth, the mass of the same object on the Moon is:

The Same

18. A 1kg mass at the Earth's surface weighs about:

10 N (newtons)

​

19. An object is pulled north ward with a force of 10N and south ward with a force of 15N. The magnitude of the net force on the object is:

5N

20. Which one has zero acceleration, an object that?

All of the above (

21. Whenever the net force of object is zero, its acceleration:

Is also zero.

22. When you stand at rest on a pair of bathroom scales, the reading on the scales will always:

Read half of your weight.​

23. A man weighing 200N stands at rest on two bathroomscales so that his weight is distributed evenly over both scales. The reading on each scale is:

100 N. ​

24. The force of friction on a sliding object is 10N. The applied force needed to maintain a constant velocity is:

10N

25. The resistive force of friction occurs for:

All of these

26. the amount of friction that occurs when two material surfaces slide against each other depends on:

both of these

27. The average speed of a horse that gallops a distance of 10km in a time of 30 minutes is:

20km/hr

28. What is the acceleration of a car that maintains a constant velocity of 100km/hr for 10 seconds?

0 ​

29. As an object freely falls, its:

Velocity increases

30. The gain in speed each second for a freely falling object is about:

10m/s

31. Motion under the influence of gravitational pull only is called:

Free fall

32. The speed at which the acceleration of a falling object terminates when air resistance balances its weight is called

Terminal velocity

33. An object maintains its state of motion because it has:

Mass. ​

34. Force is a vector quantity because it has:

Magnitude and direction

​

35. A 10kg brick and a 1kg brick are dropped in a vacuum. The force of gravity on the 10kg brick is:

10 times as much as the force on the 1kg brick​

36. A car accelerates from rest at 2m/s. What is its speed 3 seconds after the car started moving?

6m/s

37. Ten seconds after starting from rest, a freely falling object (g=10m/s) will have a speed of about:

100m/s

38. If an object is in free fall (g=10m/s2), what will be its approximate speed exactly 6 seconds later?

60m/s

39. Disregarding air resistance, objects fall at constant

Acceleration

40. Starting from rest, the distance a freely falling object (g=10m/s2) and (d=1/2gt2), will fall in 10 seconds is:

500m

41. If a car increases its velocity from zero to 60 km/hr in 10 seconds, its acceleration is:

6km/hr/s

42. If an object's mass is increased, while a constant force is applied to the object, its acceleration:

Decreases

​

43. A 10N falling object encounters 4N of air resistance. The magnitude of the net force on the object is:

6N  10-4=6

​

44. A 10N falling object encounters 10N air resistance. The net force on the object is:

0N (Zero newtons)

45. A tow truck exerts a force of 3000N on a car, accelerating it at 2m/s2. What is the mass of the car?

1500Kg

46. If the mass of an object does not change, a constant net force on the object produces a constant:

Acceleration

47. The force required to maintain an object at constant velocity in free space is equal to:

Zero

48. Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom:

At the same time as the small block.

49. When a woman stands at rest with two feet on a scale, the scale reads 500N. When she gently lifts one foot, the scale reads:

500N ​

50. A push on a 1kg brick accelerates the brick. Neglecting friction, to equally accelerate a 10kg brick, one would have to push with:

10 times as much force

​

51. When a falling object reaches its terminal velocity, its acceleration is:

Zero

52. A falling object that has reached its terminal speed continues to gain:

Neither

53. A baseball player bats a ball with a force of 1000N. The ball exerts a reaction force against the bat of:

1000N

54. As a ball falls, the action force is the pull of the Earth's mass on the ball. The reaction force is the

Pull of ball’s mass on earth, ​

55. A person is attracted toward the center of the Earth by a 500N gravitational force. The force of attraction of the Earth toward the person is:

500N​

56. The attraction of a person's body toward the Earth is called weight. The reaction to this force is:

The person's body pulling on the Earth

57. A car traveling at 100km/hr strikes an unfortunate bug and splatters it. The force of impact is:

The same for both.

58. the force exerted on the tires of a car to directly accelerate it along the road is exerted by the:

road

59. if you push an object the object will:

push you back

​

60. An object in motion comes to a stop without any external force:

False ​

61. The weight of a given object is the same on Earth and on the Moon.

False ​

62. The mass of a given object is the same on Earth and on the Moon.

True ​

63. Acceleration ids the rate of change of distance per unit time.

False

64. the law of inertia holds true only for objects in motion, but not for those at rest

false

65. The ratio of gravitational force (F)to mass (m) is the same for all objects in the same locality.

True ​

66. When acceleration is less than "g", it is a free fall.

False

​

67. Every object possesses inertia

True ​

68. In the absence of friction, no force is required to keep a horizontally moving object moving.

True ​

69. Volume indicates how much mass an object contains.

True

​

70. weight is a gravitational force exerted on an object

true

71. Density is the amount of matter in a substance

False ​

72. The higher the mass of an object, the higher becomes its inertia

73. In a vacuum, the acceleration of a free falling stone and feather is equal

True

74. The weight of an object is higher on Earth than on the Moon

True

​

75. Without net force there no acceleration –

(true)