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1.
The displacement-time graph of a moving object is shown in figure. Which of the velocity-time graphs shown in figure could represent the motion of the same body?
2.
The displacement of the particle varies with time according to the relation 
Then the velocity of the particle is
Then the velocity of the particle is
3.
A student is standing at a distance of 
from the bus. As soon as the bus begins its motion with an acceleration of 
, the student starts running towards the bus with a uniform velocity 
. Assuming the motion to be along a straight road, the minimum value of , so that the student is able to catch the bus is
from the bus. As soon as the bus begins its motion with an acceleration of , the student starts running towards the bus with a uniform velocity . Assuming the motion to be along a straight road, the minimum value of , so that the student is able to catch the bus is