89. The pilot on the plane made a "loop the loop" of radius R = 240 m. Determine the effect of pressure on the pilot's seat in the upper and lower points, if its mass m = 75 kg, and the aircraft's speed υ = 210 km / h. What speed υ0 must have a plane with the same radius of the loop, the force of pressure on the pilot's seat at the highest point was equal to zero?

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)