Force and Pressure When Using a Hypodermic Needle

In this video, I walk through the calculations needed to determine the forces required to push fluid through a hypodermic needle, specifically focusing on the relationship between the plunger and needle diameters. I explain how to apply Bernoulli's equation and the significance of pressure in this context. I also demonstrate the calculations step-by-step, leading to the final forces needed for both parts of the problem. Please make sure to follow along with your calculators to verify the results. Giancoli Physics, AP Edition, 7th Edition, Chapter 10 (Fluids), General Problem 73