Question

Velocity-time curve for a body, projected vertically upwards, is:

• A. Parabola
• B. Ellipse
• C. Hyperbola
• D. Straight line

Answer 1

Answer: (D)

From equation of motion, we have
$v=u-gt$
Where $v$ is final velocity, $u$ is initial velocity, $g$ is acceleration due to gravity and $t$ is time.
Since, body is projected vertically upwards final velocity $u=0$. $\therefore u=gt$
This equation is form of straight line equation
$y=mx+c$
Hence, graph between velocity and time is a straight line.