Assertion and reason: orbits

Exercise and reference answers

Questions

1. Reason

   Gravity supplies exactly the force that curves its path.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   A satellite needs no engine to stay in orbit.

2. Reason

   Its constant is the same for all bodies orbiting the same primary.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Kepler's third law lets you compare two orbits.

3. Reason

   Angular momentum is conserved in orbit.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Linear momentum is conserved in orbit.

Explanation