The length of a needle floating on water is 2.5 cm. The minimum force in addition to ties weight needed to lift the needle above the surface of water will be (surface tension of water is 0.072 N/m) The length of a needle floating on water is 2.5 cm. The minimum force in addition to ties weight needed to lift the needle above the surface of water will be (surface tension of water is 0.072 N/m) October 11, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related