# Jet fighter flying in a vertical loop

1. Aug 2, 2017

### jstretto

1. The problem statement, all variables and given/known data
A jet fighter flies in a vertical circle of diameter 1000 m. The speed of the aeroplane at the bottom of this circle is 185 m s-1. For the aeroplane at this point, calculate:
Apparent weight
2. Relevant equations

Fc = mv^2/r
Ac = v^2/r
Fn = Fg + Fc

3. The attempt at a solution

I cannot find a single way to find the apparent weight of something without mass, it is doing my head in. I have scowered the internet and nothing. Please help me!

2. Aug 2, 2017

### RUber

What if you were to let M be the mass of the aircraft? What would you get? Can you work out the acceleration components?

3. Aug 2, 2017

### FactChecker

I agree with you. Unless you are given the mass, you can not calculate the "apparent weight". However, you can calculate the number of g's and you can calculate a multiplying factor, A, of whatever the weight is: apparentWeight= A*airplaneMass.

4. Aug 2, 2017

### Nidum

@jstretto : This problem does have a solution . You would find it much easier to understand the problem and get to the solution if you drew a simple diagram .