The displacement of particles as a function of time is shown in the figure. The figure shows:
Correct answer: A. The particle starts with certain velocity, motion is retarded, and finally the particle stops
- A. The particle starts with certain velocity, motion is retarded, and finally the particle stops
- B. The velocity of the particle is constant throughout
- C. The acceleration of the particle is constant throughout
- D. The particle starts with constant velocity, then motion is accelerated, and finally the particle moves with another constant velocity
Explanation
The displacement-time curve starts steep and gradually flattens out. This means the rate of change of displacement (i.e., velocity) is decreasing over time. Eventually, the curve approaches a horizontal line, indicating zero velocity. Option A because the curve shows deceleration (negative acceleration), and the particle eventually comes to rest.
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