JEE MAIN - Physics (2019 - 8th April Evening Slot - No. 3)
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 = acceleration, v = velocity,
x = displacement, t = time)
_8th_April_Evening_Slot_en_3_1.png)
_8th_April_Evening_Slot_en_3_2.png)
_8th_April_Evening_Slot_en_3_3.png)
_8th_April_Evening_Slot_en_3_4.png)
(B), (C)
(A)
(A), (B), (C)
(A), (B), (D)
Explanation
Given initial velocity u = 0 and acceleration
is constant
At time t
v = 0 + at
$$ \Rightarrow $$ v = at
Also $$x = 0(t) + {1 \over 2}a{t^2}$$
$$ \Rightarrow $$ x = $${1 \over 2}a{t^2}$$
Graph (A), (B) and (D) are correct
At time t
v = 0 + at
$$ \Rightarrow $$ v = at
Also $$x = 0(t) + {1 \over 2}a{t^2}$$
$$ \Rightarrow $$ x = $${1 \over 2}a{t^2}$$
Graph (A), (B) and (D) are correct
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