A wooden stick 2m long is floating on the surface of water. The surface tension of water 0.07 N/m. By putting soap solution on one side of the sticks the surface tension is reduced to 0.06 N/m. The net force on the stick will be
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a
0.07 N
b
0.06 N
c
0.01 N
d
0.02 N
answer is D.
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Detailed Solution
Net force on stick =F1−F2=(T1−T2)l =(0.07−0.06)l=0.01×2=0.02N