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Question

A particle starts from origin O from rest and moves with a uniform acceleration along the positive x−axis. Identify all figures that correctly represent the motion qualitatively. (a=accelertaion, v=velocity, d=displacement, t=time)

A
(A)
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B
(B),(C)
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C
(A),(B),(C)
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D
(A),(B),(D)
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Solution

The correct option is D (A),(B),(D)
Given initial velocity u=0 and acceleration is constant.
So, it doesn’t change with time.

At time t, 1st equation of motion
v=u+at

As particle starts from rest u=0
v=0+atv=at
vt

From 3rd equation of motion
s=ut+12at2

As particle starts from rest u=0
st2

Final answer: (c).

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