Orbits and satellites

Exercise and reference answers

Questions

1. Question

   Kepler's third law also applies to

   Choices

   1. Earth satellites
   2. falling apples
   3. nothing else

   Correct choice

   Earth satellites

2. Question

   For motion under gravity, what is NOT conserved?

   Choices

   1. angular momentum
   2. linear momentum
   3. mechanical energy

   Correct choice

   linear momentum

3. Question

   An astronaut floats because

   Choices

   1. gravity is absent
   2. the station spins
   3. both fall together

   Correct choice

   both fall together

Explanation