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Among the following, velocity (v) - time (t) graph representing the motion of a vertically projected body is
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Velocity of a body thrown vertically upwards is given as
$\mathrm{v}_{\mathrm{f}}=\mathrm{v}_{\mathrm{i}}+\mathrm{at}=\mathrm{v}_{\mathrm{i}}-\mathrm{gt}$
for $\mathrm{t} < \frac{\mathrm{v}_{\mathrm{i}}}{\mathrm{g}}, \mathrm{v}_{\mathrm{f}}$ is positive.
for $\mathrm{t}=\frac{\mathrm{v}_{\mathrm{i}}}{\mathrm{g}}, \mathrm{v}_{\mathrm{f}}=0$
for $\mathrm{t}>\frac{\mathrm{v}_{\mathrm{i}}}{\mathrm{g}}, \mathrm{v}_{\mathrm{f}}$ is negative.
$\mathrm{v}_{\mathrm{f}}=\mathrm{v}_{\mathrm{i}}+\mathrm{at}=\mathrm{v}_{\mathrm{i}}-\mathrm{gt}$
for $\mathrm{t} < \frac{\mathrm{v}_{\mathrm{i}}}{\mathrm{g}}, \mathrm{v}_{\mathrm{f}}$ is positive.
for $\mathrm{t}=\frac{\mathrm{v}_{\mathrm{i}}}{\mathrm{g}}, \mathrm{v}_{\mathrm{f}}=0$
for $\mathrm{t}>\frac{\mathrm{v}_{\mathrm{i}}}{\mathrm{g}}, \mathrm{v}_{\mathrm{f}}$ is negative.
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