If the mass of the earth and all objects on it were suddenly ...

[chandani]

If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gravity at the surface would become
 
  A) 4 times what it now is.
  B) 1/4 of what it now is.
  C) 2 times what it now is.
  D) the same as it now is.
  E) 1/2 of what it now is.

Question 2

A test rocket is fired straight up from rest with a net acceleration of 20.0 m/s2. After 4.00 seconds the motor turns off, but the rocket continues to coast upward with no appreciable air resistance.
 
  What maximum elevation does the rocket reach?
  A) 327 m B) 487 m C) 160 m D) 408 m E) 320 m

[kalskdjl1212]

Answer to Question 1

C

Answer to Question 2

B

[chandani]

Wow, this really help

[ktidd]

Thanks for the timely response, appreciate it