The pressure exerted by a phonograph needle on a record is surprisingly large. If the equivalent of 1.00 g is supported by a needle, the tip of which is a circle 0.200 mm in radius, what pressure is exerted on the record in N/m2 ?
Step-by-step solution Step 1 of 6 Force per unit area is known as pressure. Apply this concept to find the pressure of force that act on an area. Step 2 of 6 From definition of pressure, …… (1) Here, is pressure, is force applied and is area perpendicular to the force. Step 3 of 6 Area of the tip is, Here, is radius.