Answer:
If we take origin for position measurement on the ground, then the positions of the two stones at any instant will be
...(1)
...(2)
When the first stone hits the ground,
or
or
or
As time cannot be negative, so t = 8 s
i.e. the first stone hits the ground after 8 s.
From (1) and (2), the relative position of second stone w.r.t. first is given by
As there is a linear relationship between and t, so the graph is straight line OA up to t = 8 s. After t = 8 s, only the second stone is in motion. So the graph is parabolic (AB) in accordance with quadratic equation,
The second stone will hit the ground, when
or
On solving, t = 10 s
After t = 10 s, the separation between the balls is zero, which explains the part BC of the graph.
You need to login to perform this action.
You will be redirected in
3 sec