Force on a phonograph needle is 120 gf. The needle end has a circular cross-section of radius 0.1 mm
Channel: Doubtnut
Date: 23/08/2020

Force on a phonograph needle is 120 gf. The needle end has a circular cross-section of radius 0.1 mm. Find the pressure (in atm) it exerts on the record. Given,   1 atm = `1.013 xx 10^(5) Pa. Use g=10ms^(-2)`