| Pilots of high-performance fighter planes can be subjected I to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an accumula- tion of blood in the abdomen and legs. As a result, the brain becomes starved for blood, and the pilot can lose consciousness (“black out"). The pilots wear “anti-G suits" to help keep the blood from draining out of the brain. To appreciate the forces that a fighter pilot must endure, consider the magnitude Fy of the normal force that the pilot's seat ex- erts on him at the bottom of a dive. The magnitude of the pilot's weight is W. The plane is traveling at 230 m/s on a vertical circle of radius 690 m. Determine the ratio Fx/W. For comparison, note that blackout can occur for values of Fx/W as small as 2 if the pilot is not wearing 42. an anti-G suit.

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Assuming air resistance with drag ratio- velocity for an object, initially suspended at the height Yo = 500 m above the Earth and dropped with v(0) = 0 m/s. Use gravitational accelerationg = 9. 8 m/s² . Round your answer to 2 decimal places. =0.35 find the terminal т

High-speed ultracentrifuges are useful devices to sediment materials quickly or to separate materials. An ultracentrifuge spins a small tube in a circle of radius 10.5 cm at 60000.0 rev/min. What is the centripetal force experienced by a sample that has a mass of 0.00330 kg?

A roller coaster reaches a velocity of 20 m/s at a location where the radius of curvature is 40 m. Calculate the acceleration in m/s². Correct answer is 10 m/s².

2. A Tesla rounds a flat, unbanked curve with radius R. (a) If the coefficient of static friction between the tires and the road is derive an expression for the maximum speed at which the driver can take the curve without sliding.  (b) What is the maximum speed if R = 275m and mu s =0.85 ? (c) An engineer (brilliant man that he is ) proposes to rebuild the curve , banking it so that, at a certain speed vno friction at all is needed for the car to make the curve. At what angle should it be banked if v = 22.5 m/s ?

Riding in the back of a pickup truck can be very dangerous. If the truck turns suddenly, the riders can be thrown from the truck bed. Why are the riders ejected from the bed?

. a. Consider two parachutists, a heavy person and a light person, who jump from the same altitude with parachutes of the same size. Which person reaches terminal speed first? Which person has the greater terminal speed? Which person reach the ground first? If there were no air resistance, as on the moon, how would your answers to these questions differ?

Answer it pls. What are the primary factors determining the maximum acceleration of a spacecraft entering into atmosphere? How to control the spacecraft entry to ensure the safety of the astronauts on board with the maximum acceleration less than 10g?

A car with a constant speed of 95 km/h enters a circular flat curve with a radius of 0.5 km. The friction between the road and the car's tire can supply a centripetal acceleration of 1.35 m/s². What is the acceleration the car need to remain in this curve regardless of its acceleration of 1.35 m/s²? a) 2.39 m/s² b) 1.74 m/s² c) 1.35 m/s² d) 1.39 m/s² V₁ = V + at лd²h V= C=d F = ma ac r x=x+(+v₁)t +mgh+Fyud F r