Two stones are thrown up simultaneously from the edge of a cliff 200 m high with initial speed of 15 m s -1 and 30 m s -1 respectively. The time variation of the relative position of the second stone with respect to the first as shown in the figue. The equation of the linear part is
Text Solution
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As 
For first stone,
When this hits the ground, 
, on solving, we get
Since the stone was projected at 
. Hence, negative time has no meaning in this case.
For the second stone,
When this stone hits the ground, 
, on solving, wet
is meaningless. Therefore, 
Subtracting 
from 
we get
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