Question

The nature of a graph drawn for a freely falling body with time on the $x$ - axis and speed on the $y$ - axis is (Assuming initial speed to be zero.)

• A. a straight line with positive $y$ -axis intercept.
• B. a straight line passing through the origin.
• C. a parabola.
• D. a straight line parallel to $y$ -axis with positive $x$ -axis intercept.

Answer 1

Answer: (B)

a straight line passing through the origin.

Answer 2

As we know that, for free falling body the equation of velocity is
$v=u+g t$
Since, $u=0$ then
$v=g t \, \left(\because g=10\, m / s ^{2}\right)$
$v=10 \,t$
Which is show that a straight line passing through the origin