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Q.

Figures (i) and (ii) below show the displacement – time graphs of two particles moving along the x-axis. We can say that

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a

both the particles are having uniformly accelerated motion.

b

both the particles are having a uniformly retarded motion.

c

particle (i) is having a uniformly accelerated motion while particle (ii) is having a uniformly retarded motion.

d

particle (i) is having a uniformly retarded motion while particle (ii) is having a uniformly accelerated motion.

answer is C.

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Detailed Solution

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According to  2nd law of motion 

for an uniform acceleration ,

x - x0 = ut +12at2

Displacement - time graph for a uniform acceleration will be a parabola. 

If a is positive (acceleration), the motion will have an increasing slope and if a is negative(retardation), the motion will have a decreasing slope. 

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