Question

A horizontal wind is blowing with a velocity v towards north east. a man starts running towards north with acceleration

a. the time, after which man will feel the wind blowing towards east, is

Answer 1

Ans.- C) . Let v makes angle ‘A’ with horizontal. when man feels that wind is blowing in east then component of wind’s velocity is 0 w.r.t man i.e. vsinA – at=0 t=vsinA/a nw A= 45 bcoz sinA  1 and A can’t be 90 as initially velocity was in north-east direction