In Order to Simulate Weightlessness for Astronauts in Training, They

question 91

Multiple Choice

In order to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast should an airplane be moving at the top
Of a vertical circle with a radius of 2.5 km?

• A) 510 m/s
• B) 160 m/s
• C) 310 m/s
• D) 260 m/s
• E) 79 m/s

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Definitions:

Lordosis

A curvature of the spine that results in an exaggerated inward curve of the lower back.

Kyphosis

A spinal disorder where there is an excessive outward curve of the spine, leading to a hunchback appearance.

Scoliosis

A medical condition characterized by a sideways curvature of the spine that occurs most often during the growth spurt just before puberty.

Spina Bifida

A birth defect where there is incomplete closing of the spine and membranes around the spinal cord during early pregnancy.