PHYS 101 Lecture Notes - Lecture 7: Kinetic Energy

• School: UBC
• Department: Physics
• Course: PHYS 101
• Professor: Javed Iqbal

Document Summary

Phys101 - lecture 7: fluids in motion & continuity. Kinetic energy per unit volume of the fluid: Unit: kg/m3 x m2/s2 = (kg x m2/s2)(1/m3) = j/m3. U =( m)gh h : height from reference point (ie. ground) Potential energy per unit volume of fluid: Density of fluid is constant and does not change with pressure. Neglect frictional force between layers of a moving fluid. Good assumption for gases; not good for liquids. Streamline: path taken by a small element of fluid as it passes along with the rest of the fluid. In a laminar flow, streamlines do not cross. Volume of fluid that flows per unit time through a surface. Amount of fluid that enters is equal to the amount of fluid that leaves. Mass of fluid entering from left in time t. Mass of fluid leaving from the right in the same time: For constant density: a 1 v1= a2 v2.