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Questions  

The displacement of a particle as a function of time is shown in figure. It indicates

a
The particle starts with a certain velocity, but the motion is retarded and finally the particle stops.
b
The velocity of the particle decreases.
c
The acceleration of the particle is in opposite direction to the velocity.
d
The particle starts with a constant velocity, the motion is accelerated and finally the particle moves with another constant velocity.

detailed solution

Correct option is A

Initially at origin, slope is not zero, so the particle has some initial velocity but with time we see that slope is decreasing and finally the slope becomes zero, so the particle stops finally. As the magnitude of velocity is decreasing, velocity and acceleration will be in opposite directions.

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A particle starts moving along a straight line path with a velocity 10 m s-1. After 5 s, the distance of the particle from the starting point is 50 m. Which of the following statement about the nature of motion of the particle are correct? 


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