NEETMomentum and CollisionHard
Question
The length of needle floating on the surface of water is 1.5 cm. The force in addition to its weight required to lift the needle from water surface will be (surface tension of water = 7.5 N/cm) : -
Options
A.22.5 N
B.2.25 N
C.0.25 N
D.225 N
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