Suppose you wanted to hold up an electron against the force of ...

[humphriesbr@me.com]

Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above it.
 
  How far above the electron would the proton have to be? (k = 1/40 = 9.0  109 N  m2/C2, e = 1.6  10-19 C, mproton = 1.67  10-27 kg, melectron = 9.11  10-31 kg)
  A) 4.6 m B) 3.7 m C) 5.1 m D) 2.3 m E) 1.5 m

Question 2

A rock is projected upward from the surface of the Moon, at time t = 0 s, with an upward velocity of 30.0 m/s. The acceleration due to gravity at the surface of the Moon is 1.62 m/s2, and the Moon has no atmosphere.
 
  The height of the rock when it is descending with a speed of 20.0 m/s is closest to A) 115 m.
  B) 125 m.
  C) 135 m.
  D) 145 m.
  E) 154 m.

[milbourne11]

Answer to Question 1

C

Answer to Question 2

E

[humphriesbr@me.com]

Both answers were spot on, thank you once again

[milbourne11]

Great! Please up vote