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3 cards from this section. Quick, good the night before a test.
What condition leads to weightlessness in an elevator?
Think about what happens to you in a falling elevator.
True or False: Weightlessness means gravity is absent.
Remember that gravity is always pulling down.
What causes the feeling of weightlessness?
Think about the forces acting on you during free fall.
True or False: Astronauts feel weightless because they are far away from Earth's gravity.
Consider the relationship between gravity and distance.
If the gravitational force acting on an astronaut in a spacecraft is 1000 N, explain why they do not feel this force.
Consider the role of forces acting during motion.
Determine the effects of prolonged exposure to weightlessness on the human body. What precautions should astronauts take?
Think about how the body adapts to various environments.
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