Fizzix? g's?

[Goldenboko]

What the hell is a g? "A jet plane flying 600 m/s experiences an acceleration of 4g when pulling out of the dive. What is the radius of curvature of the loop in which the plane is flying?"

Confused ;-;

[qwertysaur]

acceleration due to gravity

[Goldenboko]

Need moar then that? What defines a g? Isn't it like, newtons times gravity or something?

[rubah]

9.81 m/(s^2)

32 ft/(s^2)

multiply accordingly

[Shoeberto]

There is a difference between G (capitalized) and g (lowercase). Though this one probably is g, which is just an acceleration due to gravity. There's a way of obtaining it using G (the gravitational constant) in a formula but you can pretty much just accept that it's the numbers that Allie said when you're dealing with things on earth.

[blackmage_nuke]

Simply put, 4g is 4 times the acceleration due to gravity. Acceleration due to gravity is 9.81 m/s^2

So 4g is 39.24 m/s^2 which is the acceleration on the plane.

Assuming they're talking about earth of course.

[Aerith's Knight]

This thread makes me sad.

The formula you are looking for is this one, I guess:

F = mv^2 / r

In which:

m = mass
v = speed
r = radius

You can be smart by saying F = m * a = m * 4g = mv^2 / r

You divide out the m and get:

4g = v^2 / r

r = v^2/4g

r = 360000 / 4 * 9.81 =~ 9000 m