If we find v = A , where is a length and v is a speed, what are ...

[Zulu123]

If we find v = A , where  is a length and v is a speed, what are the mks units for the A?
 
  A) s-1
  B) m2/s
  C) m/ s2
  D) s
  E) kg-m/s

Question 2

For a spherical planet to act like a point mass, so that externally F=GmM/r2, it
 
  A) must have constant density throughout.
  B) must have a mass << r c2 / (2G).
  C) must have spherical mass symmetry.
  D) can not be hollow inside.

[tranoy]

Answer to Question 1

A

Answer to Question 2

C

[Zulu123]

Gracias!

[laurnthompson]

Excellent