A balloon having mass ' m ' is filled with gas and is held in hands of a boy. Then suddenly it get released and gas starts coming out of it with a constant rate. The velocity of the ejected gases is also constant 2 m/s with respect to the balloon. Find out the velocity of the balloon when the mass of gas is reduced to half. (Neglect gravity & Bouyant force),
Text Solution
Verified by ExpertsThe correct answer is:
C
Neglecting gravity,
v = u λ n ; 
u = ejection velocity w.r.t. balloon m 0 = initial mass m t = mass at any time t.
u = m 0 =m t = t
= 2 λ n 
= 2 λ n2
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