The viscous drag on a sphere moving at 2 m/s is 0.05 N. What is the drag force when the speed is increased to 4 m/s?
Q1. The viscous drag on a sphere moving at 2 m/s is 0.05 N. What is the drag force when the speed is increased to 4 m/s?
Answer: 0.10 N
Explanation: Force is directly proportional to speed (F = 6πηrv). Doubling the speed from 2 m/s to 4 m/s doubles the force from 0.05 N to 0.10 N.