Two stones are thrown up simultaneo...
Question

# Two stones are thrown up simultaneously from the edge and 40 m/s respectively. Which of the following graph be position of the second stone with respect to the first ?(assum ground and neglect air resistance, take g = 10 m/s) (The ng scale.) siy from the edge of a cliff 240 m high with initial speed of 10 m/s Following graph best represents the time variation of relative ue tirst ?(assume stones do not rebound after hitting the The figures are schematic and not drawn to (JEE(Main)-2015; 4/120,-1] ↑oyz- y.)m Toyz - v.)m 240 (1) 240+ 8 12 T(yz - v.)m Toyz - v.)m 240 - LB 340/ (4) 8 12 ts) 8 12 is)

JEE/Engineering Exams
Physics
Solution
166
4.0 (1 ratings)
for ( 10 mathrm{m} / mathrm{s} ) stone, [ -240=10 z-5 t^{2} ] ( Rightarrow quad t^{2}-2 z+48=0 ) ( (t-8)(t+6)=0 ) ( t=8 mathrm{sec} ) ton ( 210 mathrm{m} / mathrm{s} ) ( begin{array}{rlr} & -240=40 t-5 t^{2} & text { at } z=8 Rightarrow & t^{2}-8 z+48=0 & y_{r e l}=240 underline{m}end{array} ) ( (t-12)(t+4)=0 ) ( t=12 mathrm{sec} ) ( therefore ) ubto ( A=8 mathrm{sec}, ) arel ( =0 ) (hethwillbe ( V gamma e l=C ) ( sin a x) ) ( therefore y_{x e l}=c_{x} ) ( 8
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