Momentum and CollisionHard
Question
A thin liquid film formed between a U-shapedwire and a light slider supports a weight of1.5 × 10-2 N (see figure). The length of theslider is 30 cm and its weight negligible. Thesurface tension of the liquid film is :-
Options
A.0.025 Nm-1
B.0.0125 Nm-1
C.0.1 Nm-1
D.0.05 Nm-1
Solution
weight = mg = 1.5 × 10-2 N (given)
length = l = 30 cm (given)
= 0.3 m
2Tl = mg
= 0.025 N/m
length = l = 30 cm (given)
= 0.3 m
2Tl = mg
= 0.025 N/mCreate a free account to view solution
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