Calculating the pilot's effective weight at the bottom and top of a circle

[bfpearce]

Ok so there are two part to this problem:

Info: A jet pilot takes his aircraft in a vertical loop

Part 1: If the jet is moving at a speed of 1500 at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.6 's.

I got the answer of this one to be 2.7 X 10^3

Part 2: Calculate the 68- pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same speed).

I honestly don't even know where to start with this one. Can somebody help??

 

[Andrew Mason]

Ok so there are two part to this problem:

Info: A jet pilot takes his aircraft in a vertical loop

Part 1: If the jet is moving at a speed of 1500 at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.6 's.

I got the answer of this one to be 2.7 X 10^3

Part 2: Calculate the 68- pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same speed).

What are the forces acting on the pilot at the bottom? Draw a free body diagram. What must the sum of all forces be equal to in any free body diagram? What is the acceleration of the pilot at the bottom? Write out the equation for the sum of all forces. What must the magnitude of the normal force be in order for the forces to add up to the total net force?

Now do the same thing for pilot at the top of the loop.

AM