IIT JEE , AIEEE Forum - Physics , Mechanics

prateek.agarwal

i cudn't solve this...

jalanshruti

take a component in BC. write v=sqrt(t/u)
where v- velocity of wave
t - tension in string
u - mass/length
write dx/dt integerate it for length l we get time taken to travel from c to b
do same thing for b to a with u diff
and get the ans

prateek.agarwal

arrey...but what will be the tension...rest all to even i know...

jalanshruti

arre yaar u can find tension by drawing free body diagram of mass of rope below component

let m be mass of string and l length

u=m/l

take a component at a distance x from free end

mass of rope below component u*x

since equilibrium

so t=mg

Ask & Discuss Questions with Community & Experts