Now you\'ll figure out a way to define the wind field more precisely. The smalle

Question

Now you'll figure out a way to define the wind field more precisely. The smaller kite has cross-sectional area 0.50 m^2. When held at point it feels a wind force of N. larger kite has exactly twice cross-sectional A, the smaller kite. What wind force the area of would you expect the larger kite feel at point A? Explain Now a kite of cross-sectional area 2.0 m2 is held at point A. What wind force do you expect it to feel? Why? Here's the punch line. Each of three kites from question and (2) feels a different wind force at the same at point But they should each feel the same wind field because the wind itself is the wind point A no matter which kite you hold there. Is there some number having to do with a force and cross-sectional area that's the same for all three kites and could therefore work as definition of wind field? This is hard; try it for a while, and if you get stuck, move to the next question. Here are two proposed definitions of wind field: wind field = wind force times cross-sectional area, or wind field-wind force area. Which of those definitions. if either, better captures the intuitive sense of what wind field is supposed to mean (as discussed on page 1)? Let's think more about the "better" definition of wind field from question (7). What are the units of that number? Explain what that definition of wind field means in terms your roommate could understand (assuming your roommate isn't a physics person).

Explanation / Answer

1) Force = Field * Area

3N = Field * 0.5m2

Field = 6 N/m2

Force = Field * Area = 6N/m2*1m2 = 6N

2) Force = Field * Area = 6N/m2*2m2 = 12N

4) Force = Field * Area (or) Field = Force / Area

5) Units of Field are N/m2

6)The definition means pressure

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