1. An object is moving on a constant velocity at straight path has an accelerati

Question

1. An object is moving on a constant velocity at straight path has an acceleration equal to
2. an object is thrown up with initial velocity v at a height H. another object thrown with initial velocity 2v will attain a height of
3. a ball is thrown upward. While it is in the air, its acceleration is
4. a ball is thrown upward with an initial velocity v. its velocity halfway to its highest point is
5. If an object is moving at constant acceleration in straight path, its instantaneous velocity halfway through any time interval is
6. The magnitude of the displacement of a particle is _______ the distance it traveled
7. A particle moving at 4.0 m/s in the positive x direction has an acceleration of 3.0 m/s^2 in the positive y direction for 2.0 s. the final speed of the particle is
8. The maximum range in a projectile is reached at constant velocity, when the angle of elevation is

9. On the distance time graph, a straight line sloping upward to the right corresponds to a motion at 10. On a velocity-time graph, the motion of a car traveling along a straight road with the uniform acceleration would appear as a

Choices:

1. A. gravity b. zero c. initial velocity d. one 2. A. 4H b. 3H c. 2H d. H
3. A. decreasing b. constant c. zero d. increasing
4. A. 0.25v b. 0.5v c. 0.707v d. none of the above
5. A. greater than its average velocity b. less than its average velocity c. equal to its average velocity d. twice its average velocity
6. A. larger than b. smaller than c. smaller or equal to d. the same as
7. A. -2.0m/s b. 7.2m/s c. 6.0 m/s d. 10 m/s
8. A. 30 degrees b. 45 c. 60 d. 180
9. A. zero speed b. constant speed c. increasing speed d. decreasing speed
10. A. horizontal line b. straight line sloping upward to the right c. straight line sloping downward to the right d. downward curve sloping to the right

Explanation / Answer

1. An object is moving on a constant velocity at straight path has an acceleration equal to zero (change in velocity per time is acceleration as there is no change in velocity, there is no acceleration) 2. an object is thrown up with initial velocity v at a height H. another object thrown with initial velocity 2v will attain a height of 4H (v^2 = 2gH so if v is doubled, H get 4 times) 3. a ball is thrown upward. While it is in the air, its acceleration is decreasing (acceleration due to gravity pulls the object down so it is positive if the body falls) 5. If an object is moving at constant acceleration in straight path, its instantaneous velocity halfway through any time interval is greater than its average velocity 6. The magnitude of the displacement of a particle is smaller or equal to the distance it traveled 8. The maximum range in a projectile is reached at constant velocity, when the angle of elevation is 45 9. On the distance time graph, a straight line sloping upward to the right corresponds to a motion at increasing speed 10. On a velocity-time graph, the motion of a car traveling along a straight road with the uniform acceleration would appear as a straight line sloping upward to the right

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