Posted by **Anonymous** on Friday, November 4, 2011 at 10:45am.

If a person has a weight of 145 lb at sea level, by how much is their weight reduced when flying on an airplane at an altitude of 10700 m?

- physics -
**drwls**, Friday, November 4, 2011 at 11:21am
Earth radius = 6371 km

airplane altitude = 10.7 km

Weight at altitude =

145 lb*(6371/6381.7)^2

= 144.51 lb

The reduction is 0.49 lb

Note: Yoy do not have to convert the altitudes to feet or miles, because we only needed to use a ratio of distances from the center of the earth. Ratios are dimensionless.

## Answer this Question

## Related Questions

earth - If a person has a weight of 145 lb at sea level, by how much is their ...

physics - The mass of 1 cubic meter of air at sea level is about 1.3kg. Hoe much...

physics - The mass of 1 cubic meter of air at sea level is about 1.3kg. Hoe much...

math - 1. Many people know that the weight of an object varies on different ...

ALGEBRA - 1. Many people know that the weight of an object varies on different ...

Math - 1. Many people know that the weight of an object varies on different ...

Math - 1. Many people know that the weight of an object varies on different ...

Algebra - 1. Many people know that the weight of an object varies on different ...

physics - Which is true as one gets closer to the center of the earth? a. The ...

Math - Hint: Pay attention to the units of measure. You may have to convert ...