Assertion and reason

Exercise and reference answers

Questions

1. Reason

   They and the station are falling toward Earth at the same rate.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Astronauts float inside an orbiting station.

2. Reason

   It follows from angular momentum conservation, which holds for any central force.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Kepler's second law is not special to gravity.

3. Reason

   Astronauts there experience weightlessness.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Gravity is negligible at satellite altitude.

Explanation