12
QuizMultiple Choice

Unit Test — Unit test

Question 12 • TX-Physics A

Which best explains why astronauts appear weightless when they are in a space shuttle orbiting Earth?

Answer
A
They are falling toward Earth at the same rate as the space shuttle.
B
They are falling toward Earth at a faster rate than the space shuttle.
C
They are too far from Earth to experience gravity.
D
They are too far from Earth to experience air resistance.

Explanation

Gravity still pulls on astronauts in orbit, so they are not weightless because they are beyond Earth's gravity. The shuttle and the astronauts are both falling toward Earth at the same rate while moving forward fast enough to keep orbiting. Because they fall together, the astronauts do not press against the shuttle floor and appear weightless. The best choice is A, that they are falling toward Earth at the same rate as the shuttle.

AI-written and checked against the verified answer.

Previous
Next