Why is it that the Earth’s gravity is powerful enough to pull aeroplanes down from the sky if they didn’t move fast enough yet we can easily raise our arms in the air without feeling any force pulling on them?

997 views

Why is it that the Earth’s gravity is powerful enough to pull aeroplanes down from the sky if they didn’t move fast enough yet we can easily raise our arms in the air without feeling any force pulling on them?

In: Physics

8 Answers

Anonymous 0 Comments

It’s all about lift, planes have to generate enough lift to escape the pull of gravity, if they go too slow, the amount of lift generated drops too low to overcome gravity and they fall.

Imagine lifting your arms up with a 20lb weight in each….you have to work a little harder than with no weights but not too difficult right? Now imagine holding your arms up and having a friend strap 100lb weights to each. Unless you constantly work with that amount of weight, you’re not going to be able to overcome the effect of gravity with that much weight.

You are viewing 1 out of 8 answers, click here to view all answers.