The force on phonogram needle is 1.2 N.The point point has a circular cross section of radius 0.1mm.Calculate the pressureon the record in Pascal.
Given:
The force on phonogram needle is, F = 1.2 N.
The point has a circular cross section of radius, r = 0.1mm = 10-4 m
⇒ Area = π r2 = 3.14 × 10-4 m2
Pressure = F/A
Please substitute the values from above and get the desired answer!