Question

A stone is falling from a mountain. The velocity of the stone is given by $V=9.8t$. Draw its graph and find the velocity of the stone ${}^{\prime }{4}^{\prime }$ seconds after start.

Answer 1

The velocity at each second is shown in the table below:

x (time in second)	0	1	2	3	4
y (velocity in m/s)	0	9.8	19.6	29.4	39.2

As we can see after $4$ sec velocity of stone is $39.2m/s$.

The velocity-time graph is drawn by taking velocity on the y-axis and time on the x-axis.