Question

Two planets have the same size, but different masses, and no atmospheres. Which of the following would be the same for objects with equal mass on the surfaces of the two planets? 

I. The rate at which each would fall freely 

II. The amount of mass each would balance on an equal-arm balance 

III. The amount of momentum each would acquire when given a certain impulse 

(A) I only

(B) III only

(C) I and II only

(D) II and III only

(E) I, II, and III 

Answer 1

Correct option (D) II and III only   

With different masses, g would have a different value, but the physical characteristics of the objects would not be affected.