9. An object initially traveling at 20. meters per second west accelerates uniformly at 4.0 meters per second? east for 2.0 seconds. The displacement of the object during these 2.0 seconds is (1) 32 m east (2) 32 m west (3) 48 m east (4) 48 m west

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Chapter1: Units, Trigonometry. And Vectors
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please help with questions 29,30,31,32,33,34,35
27. Which object had the greatest acceleration?
28. Compared to the average speed of object A,
the average speed of object D is
(1) less
(2) greater
34. What is the average velocity of the object from
t = 0 to t = 3 seconds?
(2) 2 m/s
(1) 1 m/s
(3) 3 m/s
(4) 0 m/s
35. During which time interval is the object
accelerating?
(3) the same
36. Which quantity is constant for a freely falling
object near Earth's surface?
29. An object initially traveling at 20. meters
per second west accelerates uniformly at
4.0 meters per second? east for 2.0 seconds.
The displacement of the object during these
2.0 seconds is
(1) displacement
(2) speed
(3) velocity
(4) acceleration
37. Which graph best represents the motion of an
object falling from rest near Earth's surface?
[Neglect friction.]
(3) 48 m east
(1) 32 m east
(2) 32 m west
(4) 48 m west
30. An object initially traveling at 20. meters per
second south accelerates uniformly at 6.0 meters
per second? north and is displaced 25 meters.
The final velocity of the object is
(1) 26 m/s north
(2) 26 m/s south
(3) 10. m/s north
(4) 10. m/s south
Time
Time
(1)
(3)
31. The time-rate of change of displacement is
(1) acceleration
(2) distance
(3) speed
(4) velocity
Base your answers to questions 32 through 35
on the following graph, which represents the
relationship between the displacement of an
object and time.
Time
Time
(2)
(4)
38. What is the total distance that an object near
the surface of Earth falling freely from rest
travels in 3.0 seconds?
Displacement vs. Time
(1) 88 m
(2) 44 m
(3) 29 m
(4) 9.8 m
39. An object starts from rest and falls freely near
Earth's surface for 3.00 seconds. Calculate the
final speed of the object.
40. An object is thrown vertically upward from the
surface of Earth. Which graph best represents
the relationship between velocity and time for
the object as it rises and then returns to Earth?
4.
6.
Time (s)
32. How far is the object from the starting point at
the end of 3 seconds?
Time
Time
Time
Time
33. During which time interval is the object at rest?
(1)
(2)
(3)
(4)
Statics
The branch of mechanics that treats forces which act on objects at rest is
called statics. A force is a push or pull measured in newtons, N, a derived
unit in the SI system. Force is a vector quantity.
Concurrent Forces
Two or more forces that act on the same object at the same time are called
concurrent forces. The single force that is equivalent to the combined effect
33
Displacement (m)
Velocity
Distance
Speed
Speed
Transcribed Image Text:27. Which object had the greatest acceleration? 28. Compared to the average speed of object A, the average speed of object D is (1) less (2) greater 34. What is the average velocity of the object from t = 0 to t = 3 seconds? (2) 2 m/s (1) 1 m/s (3) 3 m/s (4) 0 m/s 35. During which time interval is the object accelerating? (3) the same 36. Which quantity is constant for a freely falling object near Earth's surface? 29. An object initially traveling at 20. meters per second west accelerates uniformly at 4.0 meters per second? east for 2.0 seconds. The displacement of the object during these 2.0 seconds is (1) displacement (2) speed (3) velocity (4) acceleration 37. Which graph best represents the motion of an object falling from rest near Earth's surface? [Neglect friction.] (3) 48 m east (1) 32 m east (2) 32 m west (4) 48 m west 30. An object initially traveling at 20. meters per second south accelerates uniformly at 6.0 meters per second? north and is displaced 25 meters. The final velocity of the object is (1) 26 m/s north (2) 26 m/s south (3) 10. m/s north (4) 10. m/s south Time Time (1) (3) 31. The time-rate of change of displacement is (1) acceleration (2) distance (3) speed (4) velocity Base your answers to questions 32 through 35 on the following graph, which represents the relationship between the displacement of an object and time. Time Time (2) (4) 38. What is the total distance that an object near the surface of Earth falling freely from rest travels in 3.0 seconds? Displacement vs. Time (1) 88 m (2) 44 m (3) 29 m (4) 9.8 m 39. An object starts from rest and falls freely near Earth's surface for 3.00 seconds. Calculate the final speed of the object. 40. An object is thrown vertically upward from the surface of Earth. Which graph best represents the relationship between velocity and time for the object as it rises and then returns to Earth? 4. 6. Time (s) 32. How far is the object from the starting point at the end of 3 seconds? Time Time Time Time 33. During which time interval is the object at rest? (1) (2) (3) (4) Statics The branch of mechanics that treats forces which act on objects at rest is called statics. A force is a push or pull measured in newtons, N, a derived unit in the SI system. Force is a vector quantity. Concurrent Forces Two or more forces that act on the same object at the same time are called concurrent forces. The single force that is equivalent to the combined effect 33 Displacement (m) Velocity Distance Speed Speed
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