Rotational MotionHard
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
View Solution FreeMore Rotational Motion Questions
A fly wheel is rotating about its axis at a constant angular velocity. If suddenly an object sticks to it on the rim, th...A fly wheel originally at rest is to reach an angular velocity of 36 radian/s in 6 second. The total angle it turns thro...A solid cylinder of mass 20kg has length 1 m and radius 0.2 m. Then its moment of inertia (in kg-m2) about its geometric...An ant is sitting at the edge of a rotating disc. If the ant reaches the other end, after moving along the diameter, the...An annular ring with inner and outer radii R1 and R2 is rolling without slipping with a uniform angular speed. The ratio...