The displacement of objects with respect to a constant moving (v) frame in the same direction is?
Correct answer: B. x + vt
- A. x - vt
- B. x + vt
- C. x
- D. x + vt + at2.
Explanation
When an object moves at a constant speed in the same direction then the velocity is also constant and it will not change the speed and direction. This also means that the acceleration is zero. Option D can be eliminated first. Here, x is the initial position of an object at time t=0. To find the position at final time t, we use the formula "x + vt", where vt represents the change in displacement. Since this displacement is along the same direction as the displacement that resulted in the initial position, A can also be eliminated. The correct option is B.
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About Displacement and Velocity
Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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