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. )

Options

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

B

Explanation

As we know that, for free falling body the equation of velocity is
`v=u+"gt"`
Since, `u=0` then
`v="gt"` ( `:.g=10m//s^(2)`)
`v=10t`
Which is show that a straight line passing through the origin. So, the correct option is (b).