Author Question: If the mass of the earth and all objects on it were suddenly doubled, but the size remained the ... (Read 89 times)

chandani · **on:** Jul 29, 2018

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