Two stones are thrown up simultaneously from the edge of a cliff ` 240 m ` high with initial speed of ` 10 m//s and 40 m//s` respectively . Which of the following graph best represents the time variation of relative position of the speed stone with respect to the first ? ( Assume stones do not rebound after hitting the groumd and neglect air resistance , take ` g = 10 m//s^(2))` ( The figure are schematic and not drawn to scale )A. B. C. D.

Two stones are thrown up simultaneously from the edge of a cliff ` 240

1.	Two stones are thrown up simultaneously from the edge of a cliff ` 240 m ` high with initial speed of ` 10 m//s and 40 m//s` respectively . Which of the following graph best represents the time variation of relative position of the speed stone with respect to the first ? ( Assume stones do not rebound after hitting the groumd and neglect air resistance , take ` g = 10 m//s^(2))` ( The figure are schematic and not drawn to scale )A. B. C. D.
Answer» Correct Answer - B ` y_(1) = 10t - 5t^(2) , y_(2) = 40t - 5t^(2) ` for ` y_(1) = -240 m , t = 8s` `:. Y_(2) - y_(1) = 30 t for t le 8s `. ` y_(2) - y _(1) = 240 - 40 t - 1/2 gt^(2) `