A wooden stick 2 , m long is floating on the | vedclass

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(D) The force due to surface tension on one side of the stick is given by $F = T 	imes l$,where $T$ is the surface tension and $l$ is the length of t

Vedclass · Accepted Answer

$0.02$

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(D) The force due to surface tension on one side of the stick is given by $F = T 	imes l$,where $T$ is the surface tension and $l$ is the length of the stick.Since the stick has two sides (or rather,the surface tension acts on both sides of the stick along the length),the net force is the difference in forces acting on the two sides.Let $T_1 = 0.07 \, N/m$ and $T_2 = 0.06 \, N/m$.The net force $F_{net} = (T_1 - T_2) 	imes l$.Substituting the values: $F_{net} = (0.07 - 0.06) 	imes 2$.$F_{net} = 0.01 	imes 2 = 0.02 \, N$.

$A$ wooden stick $2 \, m$ long is floating on the surface of water. The surface tension of water is $0.07 \, N/m$. By putting soap solution on one side of the stick,the surface tension is reduced to $0.06 \, N/m$. The net force on the stick will be ....... $N$.

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