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Chapter 9: Problem 34

Should a canoe paddle be made rough to get a "better grip on the water" for paddling purposes? Explain.

Short Answer

Expert verified
No, a rough canoe paddle does not necessarily provide a 'better grip' on the water for paddling. The 'no-slip condition' in fluid dynamics means that any paddle can 'grip' the water. However, a rough paddle can increase friction, making it harder to move through the water and potentially wasting the paddler's energy.

Step by step solution

01

Understand the fundamentals of fluid dynamics

It's important to know that water is a fluid and its interaction with surfaces is governed by the principles of fluid dynamics. One key concept in fluid dynamics is that when an object moves through a fluid (like water), the fluid near the surface of the object 'sticks' to the surface due to viscosity which is called the 'no-slip condition'.
02

Examine the role of friction

The next concept to understand is friction. Friction between the paddle and water can slow down the paddle's motion and waste the paddler's energy. Rough surfaces usually increase friction as there is more surface area in contact with the fluid.
03

Evaluate the question

Given the 'no-slip condition' in fluid dynamics, a paddle, whether rough or smooth, will always be able to get a 'grip' on the water. Since friction would be more with a rough paddle due to larger surface area, it may actually make it harder for the paddle to move through the water and thus could waste the paddler's energy. Hence, a rough paddle may actually not provide a 'better grip' on the water for paddling purposes.

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