Calculating Minimum Turn Radius for 200 m/s Jet

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To calculate the minimum turn radius for a 21,000 kg jet making a 40-degree banked turn at 200 m/s, the formula R = V^2 / (g*tanθ) is used. Substituting the values, the minimum turn radius is determined to be 8,165 meters. This calculation considers the centripetal acceleration and the forces acting on the jet, ensuring it maintains altitude during the turn. Understanding this radius is crucial for pilots to gauge their aircraft's maneuverability and execute precise turns. This information is essential for successful flight operations and safety.
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A review question for the test our teacher is going to give us is:

A 21,000 kg jet makes a 40 deg banked turn w/o losing altitude. Assume the life vector is perpendicular to the plane of the wings. What is the minimum radius turn it can execute at a speed of 200. m/s?

Any help appreciated.
 
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Analyze the forces acting on the jet. Since it's turning, it is centripetally accelerated. (Consider the horizontal and vertical components of the forces.)
 


To calculate the minimum turn radius for a 200 m/s jet making a 40 degree banked turn without losing altitude, we can use the formula R = V^2 / (g*tanθ), where R is the minimum turn radius, V is the velocity, g is the acceleration due to gravity, and θ is the bank angle.

Plugging in the given values, we get R = (200 m/s)^2 / (9.8 m/s^2 * tan 40°) = 8,165 meters. This means that the jet can execute a minimum turn radius of 8,165 meters at a speed of 200 m/s and a bank angle of 40 degrees without losing altitude, assuming the lift vector is perpendicular to the plane of the wings.

This calculation is important for pilots to understand as it helps them determine the limits of their aircraft's maneuverability and allows them to make precise turns while maintaining altitude. I hope this helps with your review question and good luck on your test!
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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