A stone is dropped from a height h simultaneously another stone is thrown up from the ground which reaches the - Physics - Motion In A Straight Line

Question

A stone is dropped from a height h simultaneously another stone
is thrown up from the ground which reaches the height 4h The two
stones cross each other after a time

Neha Gupta · Accepted Answer

u is the velocity with which second  stone is projected 
v2-u2 = 2asat heighest point v = 0s= 4ha= -g0 -u2  = -2g4hu=8ghlet t is the time when they cross eath other
in t time distance tarvel by first stone is:x = ut+0
5gt2x = 0+0
5×10t2x = 5t2distance travelled by second stone is :h-x = ut-5t2h -5t2 =8ght - 5t2h = t8ght = h8g

A stone is dropped from a height h simultaneously another stone is thrown up from the ground which reaches the height 4h.The two stones cross each other after a time.