Because the natural world is full of hydrophobic and hydrophilic surfaces, the basics of the phenomenon have been known by scientists for at least two centuries. For example, the lotus leaf is a well-known example of a hydrophobic material, protecting the water-dwelling plant from becoming waterlogged.
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system.Value of mechanical advantage is load(L)/Effort(E). â¦.
It iscalculated by:Efficiency 100%Due to friction, the efficiency of a machine is always less than 100 percent. Solved Examples Example 1: Tamara rides her skateboard 1.5 meters up a ramp to aheight of 0.5 meters above the ground. Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. Section 14.3 Mechanical Advantage and Efficiency Efficiency Because some of the work input to a machine is used to overcomefriction, work output is always less than work input.