IIT JEE , AIEEE Forum - Physics , Mechanics

dlc6e371

two persons each of mass 40kg are standing on block A of mass 10kg which in turn is kept on another block B of mass 20kg & the entire system is on a smooth ground now two persons standing on topmost block's ends i.e. X at other end & Y on another end now they approch each other with const. speed of V1=10m/s TOWARDS RIGHT (i.e.X) & V2=5m/s TOWARDS LEFT ( i.e.Y) as a result b moves right by100m in 20s then vel. of A wrt ground is

pannaguma

B moves to the right. But of the two persons moving with velocity 10m/s and 5m/s who is on right and who is on left?

inteligento

my ans. is coming to be 60 m/s. If tis right, tell me, i shall offer you the soln.

splashprabhu

there can be 2 answers according to the motion of X and Y.

if X goes towards right vel. of A = 30m/s to left
if X goes towards left vel. of A = 10m/s to right

splashprabhu

inteligento? how do u get 60? conservation of momentum right?

dlc6e371

I HAD MADE A CORRECTION IN Q>

ans. is 10/3 towards left

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